Wondering if anyone has been in a similar situation!

So hubby and I decided after #2 comes we want more kids but want to wait a little longer. I’ve never been on birth control and whenever I hear someone that i know speak of it, they have had negative experiences. I would love to try long term birth control after giving birth later in the year, and during that span, lose at least 100lb. By the time I give birth in June, I’ll be 250-255. I’m just wanting to hear other women’s experiences with long term birth control while trying to lose weight. TIA!