Not sure what exists out there, I started over 25 years ago. A good first step is to learn chords, starting with major and minor versions of each chord. Get com

Not sure what exists out there, I started over 25 years ago. A good first step is to learn chords, starting with major and minor versions of each chord. Get comfortable switching between them. This is where most people quit as a lot of chords are not friendly to untrained fingers. What can help with this is a concept called the "1, 4, 5" rule (it's actually called the I, IV, V rule but let's keep it simple). Basically, you start in a key, say the key of A, assign that to 1. The 4th and 5th chords from that starting chord always sound good with the 1st. So for the key of A, the 4th and 5th are D and E. Notes start over after G, so if 4 and 5 go past, like with G, you start over at A. In the key of G, the 4th and 5th are C and D respectively, for example. This is at the heart of blues music. For me, the easiest three-chord progression for my fingers to learn was G, C, and D. There are a lot of little "rules" like that in music theory and it can be fun to learn them and experiment. If you find that you are really getting into it, I recommend dropping $300 or so on a decent acoustic guitar. There is something to be said about an instrument you can just pick up and play and not have to worry about wires and interfaces.