TTC but not trying too hard?

Just starting this adventure of getting pregnant. We are not “actively” trying, but are not preventing either. I’ve been logging temps for a while and just started taking ovulation tests this month. I’ve gotten my positive OPKs and found my ovulation day, which was cycle day 18 (late?) and of course have been BDing like crazy because ovulation makes me super frisky! Excited to see where this month takes us, but I definitely don’t expect to be successful this first month!