Best birth control for after a baby.

ka

So I’m currently 26 weeks pregnant but in order to complete my goals we have in place we do not want another child for 5-8 years minimum. I come from an extremely fertile family. My mom, aunt and cousin have all gotten pregnant on a IUD, one of my cousin got pregnant on the pill, and one on the implant. We plan on a IUD plus condoms and the pullout method but even that makes me nervous 🤣 is the IUD the most effective form Or is there another form I don’t know about that works best?