Until now, I've written lyrics in the margins of my school-books and tried to fit them to riffs I find while jamming, but it doesn't work, and those riffs are always more suited to a rock band than a solo dude.

However, soon, I'm going to be going solo, so I need some decent originals. Could anyone try and give me a framework with which to rework my song-writing process?

Would just finding a chord progression then trying to sing over it work?