Ok dude HS Senior here who also got into anime from DDLC so I'll put in my two cents.

Only thing wrong here is the stuff about claiming to be Japanese and maybe the other stuff you said with that. As for the watching anime, porn, and joking around it seemed fine.

Also be careful of being "proud" of your nationality thats what leads to nationalism, separatism, racial supremacy, etc.

Also sounds kinda weird how you cut out anime. Like if you didnt like it thats fine but you're treating some TV shows like some kinda drug addiction. Like sheesh bro but you are a 10th grader so overreacting is expected lol. I still do a lot and I definitely will be cringing at myself later.

**Basically** just do you and dont go to extremes with everything in your life because it sounds like you might do that with your nationality.

But hey what do I know