You can play in tournaments regardless of your rating.
A rating is just a snapshot of where you are. If you have been studying for years and are 1300, that's not very good. If you are just starting out, 1300 is quite respectable.
If your goal is to play chess professionally, you should be +2200 standard time control on this site by the time you're 17!
I'm 16, and I have a standard rating of 1300. I want to be able to play in tournements someday. So what I'm curious is, am I at a decent place right now for my age? I know I'm not ready yet, but how far am I from tournement play?