What is the difference between oral sex, manual sex, and anal sex?

Okay, let's be completely open and honest! I've had sex a couple times with my boyfriend, with protection of course, but honest, I don't get it!? How do you have sex? How do you do all of it!? I am so lost when it comes to anything. I was raised in the LDS church and taught that abstinence is the key. So I was never taught anything about anything and I would really like to know as much as possible! Thanks a bunch!