TTC while ebf 🤱

So my little man will be 11 months old this month he sometimes breastfeeds during the night (not all nights) He feeds between 2-4 times a day but I have started giving him cow's milk in a bottle at times because he wants it. I got my first period for Christmas 😂 22nd of Dec till 28th when bubba was 9 months and now I'm 19 days late. So still not exactly sure what my cycles are doing. I would love to start TTC for bubba #3

It took 18 months with my first and 6 months with my second so I figure starting around now wouldn't hurt. I understand that it's sort of Russian roulette with whether you ovulate or not. Some women while breastfeeding are super fertile, some women normal and some women don't ovulate till they completely stop breastfeeding. I know hormones from breastfeeding can affect ovulation tests so the best way to know if you are even ovulating at all is to chart BBT, check CM and listening to your body. Now I don't have a strict routine like we have a routine but I don't stick to it to the minute with bubba so I'm not always awake at the same time in the morning to check my BBT so do I set a special alarm in the morning to test and then go back to sleep? Please help me with this? I have never charged BBT before so this is all new and if you have charged BBT while TTC and ebf please let me know how it all went for you?

Thanks for reading my short story and reading my 101 questions 😅