for photo editing , you can use photoshop , GIMP or Affinity Photo programs . I believe it would be adequate for most if not all your post-processing/editing needs.
you can get a Tutorial from youtube or other website . whatever program you get, your still going to go through the same thing.
I prefer Gimp, as it is free to use, and you can still get professional results.
I am using the XP-Pen Deco Pro drawing pad for Gimp . It’s the best thing I ever did for photo editing. It’s seriously amazing.