Ovulation tests... Maybe TMI

I am new to this whole ovulation tracking and the tests and all that I don't understand any of it. How do the tests work? Do You pee on the stick them up there? If you get a positive on do you have sex that day and the day after or is it to late and you can keep trying but also have to wait for your next cycle?? Would it be easier if we just had sex every 2-3 days and not worry about the tests??