Who told Eve about the fruit?

God told Adam. He did not tell Eve. Eve did not exist. She was not born yet. Plus, her name wasn't even Eve until after she had eaten from the tree and then, on top of that, she told satan that God told them to "not even touch it", which is something she added to the narrative of what Adam told her. Chapter One tells us that God made the heavens and the earth and nothing else. None of the animals were created until after Adam was born. He names them all. Adam was asked what he would name his help meet. Adam said "her name is woman". After the tree incident, Adam named her Eve. It is all in the first three chapters... Garden path anyone?????

God created man first, and after Adam could not find a help meet for him, God from Adam made Eve. Yes God could have spoken with Eve and maybe He did, but its not documented, correct?
I think God/Jesus has given the man 'charge', per-say over his wife.
Think about it; if a man was to impart a word or two to a lady, out of respect he would go to the husband first expecting him to relay the message if she were married. I think God is setting an example here for husband and wife. The Adversary waited until she was alone I believe, she listened, then she 'took' the fruit to Adam. How far did she take it? Did she walk away from the tree in search of Adam? Or was he watching from a distance as men do?
Either way he ate, but she ate of it first. It seems to me like there's also a role change; with God it's the Man first, with the Adversary it's the woman first and he followed; today we suffer the consequences.

Was this for the love he had for Eve not to face her consequences alone or was he just curious to what would happen? Either way Adam directly disobeyed God.

Who told Eve about the fruit?

The simple answer is Adam., why? Eve was created to become his "helper". The "helper" commonly receives instructions and so, since Adam was the first creature who received God's instructions or commandment, Adam has the responsibility to inform his "helper".

"The LORD God also said, “It is not good for the man to be alone. I will make for him a suitable helper.” (Genesis2:18)

It would be wise to think that Adam being first creature who are already doing the Will of God will inform the Woman whom God had given him to become his "suitable helper".

To know more about the Woman's role as a "suitable helper", see this link;

A SUITABLE HELPER (IN HEBREW) Posted by Marg | Mar 8, 2010 | All Posts on Equality, Equality in Marriage, Gender in Genesis 1-3 https://margmowczko.com/a-suitable-helper/

But for us to be convinced that Adam really instructed the Woman about not to eat the fruit from the Tree of Knowledge and Good and Evil is to know what is the role God given to Adam when he placed him in the garden situated in the east.

God had placed Adam in the garden situated in the east, it means that God had placed Adam in the Temple of God, the Sanctuary of God to made and "offering" to worship and glorify God.

CCC358 God created everything for man,222 but man in turn was created to serve and love God and to offer all creation back to him:

Adam role in the garden of eden was a priest, a High Priest to "offer, worship and glorify" God in the wonders of His creation.

See this link;

Adam: High priest of humanity

... Adam and his duty to till (‘abad) and keep (shamar) the garden. These words are better translated, “to serve” and “to guard.” These two Hebrew words are only used together elsewhere in Scripture to describe the duties of the Levites. In Numbers 3:7-8 and Numbers 8:26 the Lord gives the Levites the authority to minister in the tabernacle.

https://www.catholicnewsagency.com/resources/sacraments/holy-orders/adam-high-priest-of-humanity

And this link;

Adam, the First Priest Within the First Temple PUBLISHED ON January 13, 2016 by Adam Powers https://thepublicans.org/2016/01/13/adam-the-first-priest-within-the-first-temple/

In his 1,100-page Genesis, Creation and Early Man: The Orthodox Christian Vision, author Seraphim Rose quotes a 4th century commentary by Ambrose of Milan:

The devil attacked not through the man, but through the woman - not because the woman was weaker or more passionate, because both Adam and Eve still preserved the dispassionateness of their original nature - but for the simple reason that Adam alone had heard the command of God, whereas Eve knew it only indirectly, and thereby might be considered more likely to disobey it. St. Ambrose writes of this:

[The devil] aimed to circumvent Adam by means of the woman. He did not accost the man who had in his presence received the heavenly command. He accosted her who had learned of it from her husband and who had not received from God the command which was to be observed. There is no statement that God spoke to the woman. We know that He spoke to Adam. Hence we must conclude that the command was communicated through Adam to the woman.

Paradise, XIV

It may not be clearly represented that God instructed Eve, but it is clear that she knew:

1 Now the serpent was more crafty than any other beast of the field that the LORD God had made. He said to the woman, "Did God actually say, 'You shall not eat of any tree in the garden'?" 2 And the woman said to the serpent, "We may eat of the fruit of the trees in the garden, 3 but God said, 'You shall not eat of the fruit of the tree that is in the midst of the garden, neither shall you touch it, lest you die.'" - Genesis 3:1-3 ESV

Also, note that Adam was present, as we learn a few verses later:

So when the woman saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was to be desired to make one wise, she took of its fruit and ate, and she also gave some to her husband who was with her, and he ate. - Genesis 3:6 ESV

Keep in mind that the bible is not like a screenplay, in that not every event or conversation is documented. But in reading Eve's response to the serpent, she clearly knew that God had forbidden eating from the tree of life.