u/MachineAble7113

I am a Junior in high school, and I have two years of experience with choral singing and a little experience playing the drums, but not much else in terms of formal musical training. I know very little about music theory, but I want to learn so that I can express myself at a whim, just as if I was using words. I love coming up with melodies and ideas on different instruments, but I don't have the knowledge to add chords or other lines. I don't have time to take private lessons, but I am willing to dedicate myself to it and have access to a piano and guitar. What is the best way to go about this?