>>2683036Every tutorial on how to use any kind of photo or general purpose image editor might be a tutorial for your post production.
Learn literally any of these that you like. Most common of course are Lightroom and Photoshop, but a ton of other editors work as well.
>>2683047Manage them how? You can do about anything with folder names with a command line script.
Or you can use Rawtherapee / Darktable as Lightroom alternatives.
>>2683055Sucks balls in general. It apparently works okay with some lenses but I find the result terrible with most.
Dedicated macro lens is best and at $400-900 the obvious thing to get if you often shoot macro (or if you prefer, a good microscope for $2000+ if your subjects are really small).
The option to use on the cheap is extension tubes ($10 or so) and/or an achromat filter lens for like $100.
