I don’t do photometry Kevin but I have noticed a couple of videos that might be useful to you. The Q&A sections cover a lot.
https://www.youtube.com/watch?v=ufbFaUywEBg&list=PLnZ_rvnR35rfGTaq4g3kzVOfkna1JeDyX&index=2
https://www.youtube.com/watch?v=gcE7c4CggFM&list=PLnZ_rvnR35re3ZxnumCnIesanWvUyy9eB&index=24