Joe,

The one that comes immediately to mind is Stormy Monday. I am sick of playing it but it adds minors to the blues progression.

If you want to go further without spending a lot of time, try a couple of the following ideas.

You might work on one piece of sight singing/ear training. Practice the root to third and root to flat third until you can hear the difference automatically. For example, play C note to E note. Then play C note to Eb note. Doesn't sound like much but you will be surprised at how much it helps you.

Learn to play the chords in a major scale. It's not difficult and you can probably find some help on the internet. For example, the G major scale makes the following chords: G, Am, Bm, C, D, Em, F#mb5, G. Don't worry about the F# chord until you really get the rest of it.

Then just experiment and play until things start to click.

Hope this helps.

2b

i5-3210 laptop. Win 10 Home. 2.5ghz, 64 bit. 6gb RAM. Focusrite Scarlet 2i2.