Anne, I had the same experience at first...like a mental block. But then I just allowed myself time to think about it and experimented a bit, and then the ideas started flowing. I still need to work at it, but have lots of choices as you said.
Don't feel restricted at all with your one lens, just play with what you've got and experiment.
Also, upload something, even if you aren't completely happy with it, and someone will help you with critiquing to get the results you were looking for.
Good luck and have fun!