Part of the reason you have Writer's Block is because you're in the mindset that you have Writer's Block. You aren't gonna get anything done if you're set up thinking you won't be able to. Just sit down with a sheet of paper and a pencil, and write or draw whatever comes to you. Don't stare into space, focus on the paper. Fill that puppy up, and then sift through the ideas you put out and find what worked. I've done that quite often ~_~
It's not the most pleasant thing to have to do, but it works, that much I know from personal experience. Go for it, man
Your comics are good, just don't get tripped up with this.