Hiya, welcome to the world of TTC!
You can try charting your cycles & look out for signs of ovulation like changes in cervical mucus, temperature shifts, ovulation predictor tests turning positive, cervical position/texture etc etc, or you can just BD every other day, so all bases are covered!!
It's said in a usual cycle of 28 days, the average day for ovulation is around day 14, but we are all different which is why it can be a good idea to look for the signs & pinpoint ovulation, until you really get to know your cycle.
There is a website called fertility friend (free to join) which can help you learn to chart, it's really good, a lot of the ladies on here use it.
