Hey, some advice here that may actually help, and I'm being serious here. Don't go on 13+ websites if you're under 13. There's a great reason why certain websites such as pornhub have age restrictions, and you haven't seen why. The reason why, is, on 18+ sites, there can be stuff such as gore or smut, that are definitely not for kids like you, and 13+ websites are meant for 13 and up because of some content that may be on there. Like, if you were a teenager using reddit and saw a kid on there, would you not report them for being underage? I'd be guessing so if you're a sane person. And, as well, too, what are the possibilities there's a pedo lurking in the shadows ready to f**k you? (I'm looking at you, Dr disrespect) I'll stop babbling since like half the things that I could explain to you are just generic be safe on the internet stuff since I'm trying to make you understand to not go on 13+ websites.
Okay, in a nutshell, you should not go to websites and other stuff that are targeted for audiences above your age. Wish you the best, kid, just stay off there until you're 13. :3