I'm out of county as well.
First lottery is the end of March, it's for people who completed all their pre-reqs.
Second lottery is sometime in June, it's for "Spring finisher" who are currently completing pre-reqs.
You get priority if you're in HOCO then out of county and so on.
Idk if I read/heard this right, but supposedly the more co-reqs/pre-reqs you have completed it is a higher chance you'll get in.