1. If you smoke outside, even with your script, I think there's a good chance you could still get ticketed/arrested. Depends on what city you're in and what that PD's policies are. In your home and you can't go wrong.

2. There are thousands of dispensaries in SoCal. Type medical marijuana dispensary with your zip code into Google. This site also has a directory of dispensaries. You should sign up at multiple to find one you like. Plus you normally get some free weed when you sign up at a new place.

3. 90% of the dispensaries I've been to have had a full range of edibles. You shouldn't have any trouble finding them.