First year of my period, any tips?

Hello, I am one of the few young people on here. By that I mean I'm almost 13. Heh. So, moving on, I'd like to know what to expect for my period. I've had around 3 (at least.. I think they were periods..) so far and id like to know what to expect. I know the basics, heat, midol, how it works, and stuff like that, but id like to know things like what is and isn't normal, what to expect, things I really should know, ect. I know the basics, only because I google things when I'm curious. But I'd like to know real experiences from real people. Thank you! ^^