Are there any musical people here who have any tips or resources for learning about music theory?

How much do you know?

Do you know the twelve notes? Whole step and half step? Any scales?

A B C D E F G
I am able to play a scale, I am pretty sure a whole step is a 2 fret space on a guitar and half is skip 1 fret. I don't know too much. I can read most of the treble clef.

Ok, so I'll assume that you know that the notes are 12:

C, C#/Db, D, D#/Eb, E, F, F#/Gb, G, G#/Ab, A, A#/Bb, B

So, you understand how a scale is constructed?

Can you list the notes of a major and a minor scale in any key?

All I know is a scale is set of notes. No to the second.

Look up A Beginner’s Guide to Shape Note Singing, by L. Grayson.  I think it comes in a PDF.  Also, check out Sacred Harp on YT.  

Interesting video. Thank you for sharing. He has a plethora of videos online.

1) Piano (or cheap keyboard) is the easiest instrument to learn theory with because you can do everything on just the white keys (C major scale) then add the black notes later.

2) When you play all the white keys in order you get the C major scale -

C D E F G A B C 

3) Then play every third note to build chords. Play them with your thumb, middle finger and pinky finger. So all the chords you need in C major are -

Th M P Finger order

C E G = C major
D F A = D minor
E G B = E minor
F A C = F Major
G B D = G Major
A C E = A minor
B D F = B diminished
C E G = C Major (octave)

4) Basically 95% of folk songs use the 1, 4, 5 chord progression - C, F, G.  
(1, 4, 5 just means first note of scale 'C', then fourth note of the scale 'F', and fifth note of the scale 'G'.)

I'd have to know of a nice desk size electronic keyboard. I might buy a mini usb one for 10 bucks just to toy around with. I am trying to learn guitar but I also want to get myself an electronic autoharp.

I found this helpful for ear training. You don't have to use all the effects he uses.