Beginner at Birth Control Question...

So I’m almost 21, and my whole family/friend group aren’t very open about ‘sex’ or ‘periods’ and god forbid I bring up ‘birth control.’

I was just wondering if anyone had any advise of where to go like Planned Parenthood or just a normal doctor?

Also if a certain type has worked best for anyone? I’m worried about weight gain, my boyfriend has been helping me with personal training in the gym and he is saying I look hotter because I’m losing some weight, and if I gain it back I’m worried that he’ll notice.

If anyone could help me, I feel like a lost pup at the moment 😕