I’m interested in going back to church?

I haven’t been to church since I was in high school and I’m thinking about going back. Do I have to contact the church first? I’m 24 so do I have to join the adult congregation? There’s different versions of the Bible so which one is the one being used now? Also, if anybody can recommend an asian-american church with services in English (Los Angeles area code 323), I’d appreciate it. Thanks