MJ use to build entire songs with his voice before touching a studio instrument. He would beatbox the drums, sing the bassline, hum the strings, vocalize the chords, and layer every part into a recorder. He often had the song mapped out in his head before anyone else heard it.
Being an artist can be a lonely and isolating existence. If you can, collaborate in person. The value isn't just in what you create together, but in relishing the fact that you're not alone.