Music theory covers that. Simple harmonic progressions just work. C, F, G (or I, IV, V) is your basic starter progression. You can insert some other chords, and

Music theory covers that. Simple harmonic progressions just work. C, F, G (or I, IV, V) is your basic starter progression. You can insert some other chords, and substitute chords (IV -> ii, V -> iii), etc. It'll sound good, but also predictable.