Help need all the info!

Please don’t judge me or think I’m completely clueless I just need some help. I have been pregnant 4 times and with all those four we didn’t try but we didn’t prevent either. My 4th pregnancy ended in a stillbirth at 34 weeks. This is our first time tracking and really trying for a baby. I am currently on my period and I need all the info on tracking ovulation. We had our first failed cycle last month so this month want to try to track ovulation the best I can. I have test strips coming in on Friday and would just like some info. Best time to test, how I know it’s positive and should have sex. I just honestly need all the info and any info will greatly be appreciated! I hope everyone has a great thanksgiving tomorrow!!