Tracking while having a 2 month old?

Hey all. I had my baby almost 2 months ago (she's 7 weeks now). I've wanted to take up using the fertility awareness method of birth control again (which includes bbt tracking), and I was wondering if anyone on here has done that while having a newborn, primarily because she's still waking up a couple times throughout the night. I think there's a window of time where I can get a 3 hour block of sleep though. But I was wondering if anyone else has done this. I just decided to do the mini pill for birth control for now (I'm breastfeeding), since I wasn't sure if I could temp, but I wanted to go back to tracking. So any advice from experience? Would it just be dumb to track right now? I've used FAM for birth control already in the past and for ttc, so I know how to do it very well. Just not sure if I should make the effort in doing it again now with a newborn or if I should just stick with the mini pill since it's easier.