Birth control help?

So ftm here and baby is 7 weeks old and I need to be on some sort of birth control, we want more babies but I want to wait a bit for them lol

Iv never been on birth control and iv just always have heard negative things about it, so iv always just ‘tried to play it safe’ and not be on it, I am a bigger girl and iv always heard it makes you gain weight so another reason I haven’t looked into it much, I know everyone’s body is different and reacts different to them, but I need some suggestions or help or something lol