>>601491
I'm in vocational training for machining, so I don't know a lot, but I do have dozen odd hours on the vertical milling machine and lathe each, both with DRO, and the VMM with conversational CNC, but I haven't touched that yet. Honestly if you don't need to meet tight tolerances and don't plan on huge runs, just knowing your speeds and feeds will be enough for basic operations, especially with aluminum, or really simple shit like cutting a slot in a pipe. CNC could complete an 80% in no time at all, but doing manually isn't exactly a challenge. If fabricating from plain aluminum billet, CNC would be worthwhile.
Probably better off checking Craigslist for a used full sized model, making sure it's in decent shape and can hold tolerances, and getting that for 3000 or so rather than a benchtop for not all too much less, definitely better than trying to use a drill press as a mill, or eyeballing things with a file or rotary tool. Drill press is fantastic to have, but Morse and Jacobs tapers will not handle horizontally loading well, and the machine will really be strained.
>>601529
G code is where it actually is programming. It's piss easy once you have an idea of what each command is and understand the cartesian coordinate system. CAM makes it very simple.
This goes to everyone, if you don't have a set of decent calipers, either dial or vernier, change that. Consider a micrometer too.