I had a 3rd/4th degree tear and a rough delivery. We started with sex at 6 weeks PP. Lube is good, wine also helps :) Honestly I was at least uncomfortable until about 3 months PP and it didn't start feeling more like regular, normal, enjoyable sex until more like 6 months PP. And DS is 16 months and to be honest, I still get uncomfortable in some positions that never were a problem before.
Just take your time and go slow. You'll get there!