Just been playing for 10 months but I composed a very slow and very heavy riff. I don't know how to write a full song with it. Any tips??? Also how different should be chorus from the verse??

EDIT: just composed another part for a song that would go really well with the original one. Sounds like a mixture of Sabbath and Manilla road. One question though, with my current skill I'm unable to come up with an impressive lead guitar part. However, my ego does not allow me to collaborate with another gutarist. What should I do?
Last edited by 40xxx04 at May 27, 2015,