What level am I for an NYC adult league?

I'm trying to join an adult league in NYC and want to get an idea of what level would be best for me. I'm curious if anyone is familiar with the levels in NYC adult leagues and could provide advice?

I'm 31 and not in great shape. But I played in high school and played a lot of pickup in college at a public university with a decent amount of good players. I'm worried that the beginner league will be too easy, I have a good bit of skill and experience. But I've also heard that the intermediate level can be pretty intense. I'm planning on starting with 5v5 or 7v7 to build my fitness up and shake off the rust.