Any sites for amateur tournaments???

I've been looking to get into the comp scene for a while but don't know where to start, are there any sites dedicated to the amateur scene?? (around immo 1/ass 3)

If you're looking for a good place to start I'd suggest battlefy, challengermode, and igleague. My team's played the most on battlefy since it's pretty structured and has more tournaments than the other sites.