Cycle Tracking as BC

i reallllyyt do not want to get back on BC. I just got off the Mirena IUD and it killed my sex drive. I want to let my hormones and cycle flow naturally because that seems to be the best way for my body to function. Does anyone have experience with cycle tracking & condoms as a BC method? If I am going to go down this route, is the basal temp a must for accuracy? And if so, how does that work & what kind do you rec? Thanks!!