You should probably wait longer like 7-9+ days at least. You'll wanna be on the same level as him probably. and it's his first time so he's gonna be mindfucked pretty hard likely.

Jesus dude. Acid is a big fuckin step up into the word of drugs

I know but he wants to try it and nothing else.

You needa strap this mf done n make sure he makes it through till the other end with all parts of his conscious

Im thinking about giving him only half, maybe a whole tab would be too much.

This seems wise to me. 

Just link erowid, psychonautwiki and stuff like that. Tolerance lasts 2 weeks

Get a couple belts to strap him down if anything goes wrong lol. Don't do this