Yaoi for Beginners maybe. (Fluffy and mostly no sex, maybe)

Maybe. Kind of shows a mother odd way of rejecting the fact her son is gay. Ish. This is a good read and you do see some small bit of sex. A little bit. Might still be good for beginners.

Maybe, there are pictures of before sex. Also, big age difference but it is not specified.

Sex is indicated and slightly shown (not really) but it's still safe enough for beginners. The story isn't too deep either.

Slightly past beginner.

Maybe. I don't like the obsession from one of the leads but it could still work for beginners.