Ovation tests

Me and my partner are trying for baby number #3.ive never used ovulation tests but I feel like using them this time around.this month is our first cycle of trying.i basically need a break down of when to start testing,how many times a day,when you know its positive ,how long from being positive do you have to baby dance, how long after a positive do you test for? Basically just tell me EVERYTHING i need to know about taking ovulation tests.these are ones I've taken so far. My app says I've already ovulated but they seem to be getting darker so my guess is I haven't actually ovulated yet.just help please 🤣🤣