What if You Found a Portal to the Anime world. what would you do next?

depends

am i the og protagonist?

well, if so
my answer is obvious
tokyo ghoul
(swiggity swoogity im comin for that clown ass)

but alas, lets face it

wed all be background charactershttps://i.imgur.com/84VJzOD.png?1

^ so we can bang the sexy pokemon! i like how you think enki!

Pokemon sounds like a good reason to go through, Feraligatr butt not on the immediate list of things to see but maybe later on.

If I were to tell you all that magical girls, monsters, spirits, or whatever exists and that everyone here actually is in an anime like world, you'd all just assume I was messing around. I guess what I'm trying to say is that it would be really hard to prove that cool crazy anime stuff doesn't exists.

Probably fucking die.
Someone usually starts some shit on the protag and he has to bluff/pussy his way through until romance interest one comes and saves him. I'd just stand my ground and get chinged down by a greatsword or a katana or some shit