Advice on doing bc pills?

I’m going to start taking birth control pills once I get my next period. I haven’t been to the doctor yet and I’m sure she’s going to tell me everything I need to know but I might forget to ask some questions. Am I going to gain a lot of weight? I heard about water weight and being hungry a lot but is it easy to control the hunger? And can I do the pullout method before it’s been 7 days since starting the pills? I see my boyfriend every day so it’s hard to refrain from sex for a week and we also are not into condoms hence the birth control. Will drinking alcohol affect the pills? Is there anything I really need to know? Thank you!