Mike Schmidt is the character you play as in the first game
ForgottenUsernames meant that if you are careful, you won't get killed, thus meaning no jumpscare.
However, FNAF2 has a different protagonist called Jeremy Fitzgerald.
Anyway, I have both FNAF1 and FNAF2. FNAF2 has a less creepy environment in my opinion because it's not as dark, but you get a feeling of paranoia because there are 11 animatronics to look out for (old 4, new 4, Golden Freddy, Puppet, and Balloon Boy). I think the jumpscares are less scary because the character jumps into your face instead of suddenly popping up. They make a different sound in jumpscares this time.
Before playing, I recommend looking at gifs of the jumpscares and listening to the sound they make so you can determine whether it is scary or not. But they will be more scary in-game because of the feeling of growing dread.
I normally would suggest being 15 years of age or older but if you think you can handle it, I'd say go for it...
But remember, FNAF2 is a lot harder and you will probably be killed a LOT while playing the game
https://freddy-fazbears-pizza.wikia.com/wiki/Sound_Files_%28FNaF2%29
(Go to the sound "Xscream2" under "Characters' Noises" to hear the sound it plays when you get jumpscared.