Hi tomp86,
Way, way back in the day I learned cadences in all the keys.
I was taught play ceg in the left hand with fingers 531. That is a root position I chord.
Next, keep your pinky on c and with fingers 21 play the notes fa. This is a 2nd inversion IV chord.
Next, go back to the I chord again.
Next, play bfg with 521. This is a V7 chord.
Then back to c again.
Repeat this over and over till you get very fast. Then do the right hand. Then do them together.
Start again with C#, do I, IV, V7. Then D, Eb, E, F, F#,G, Ab, A, Bb, B
You do not have to read these. They should feel and sound right after just doing plain old C!
I would recommend "Alfred's" book of scales, chords, arpeggios and cadences.
Eventually, you will have learned in any Major key, that there are 7 chords belonging to that key because the scale is a heptatonic scale. There are 3 major chords, 3 minor chords and 1 diminished.
1,4, and 5 are major. 2,3, and 6 minor. 7 is diminished.
The "Alfred" will then take you through the minor keys. 1 and 4 are minor, 2 and 7 are diminished, 3 is augmented, and 5 and 6 are major. This is based on the harmonic minor scale.
If this sounds really difficult or confusing, don't worry about it for now. It takes awhile depending on how much you study, practice, etc.
I hope I have been helpful, Joe.