Sex after pregnancy

I went back and forth on posting this for the past week, so please no judgement.

My husband and I just had a baby and I want to have sex again. I know I have to wait another 3 and a half weeks until I'm cleared by my doctor, but when that time does come, I'm super terrified of our first time back at it hurting. I've heard that using lots of lube helps, but the last time we used lube, it ended up burning down there (we later realized it was warming lube) so advice on the type of lube to use as well would be greatly appreciated. Any other tips/advice for having sex for the first time after having a baby would also be greatly appreciated! Thank you in advance!!