Get the basics of the software and basic music theory, then search your questions online as they come up.

The hardest part when I was starting was finding genre-specific advice on music production. It really took digging to get the nuggets of what felt like a trade secret. Now, though, there is a massive flood of video tutorials for just about any niche of music.

For music theory, flip through The Jazz Language by Dan Hearle. You may not need everything in there, but it will get you up to speed on contemporary music vocabulary.