Stuck at M screen too.. But has no idea what you guys are sayingg..

I did something really stupid.. I used Rom Manager and I bought my motorola cliq on ebay and it was rooted. I learned about it using youtube but I skipped the tutorial and I really wanted a nexus one theme.. I thought I knew what I was doing. I downloaded Rom Manager and installed the new version of rom... After it finished downloading, I did the clockwork thing and I backed it up but idk how to get to it..But I didn't erase the data and cache.. After pressing it..It's stuck to the M screen. I don't know any of these technical terms like booting it up.. I need step-by-step instructions on how to get out of the m screen.. I can't get to the clockwork.. By pressing Z and holding the power button.. Nothing works..

 

That's what I've been trying to do and nothing works D: After holding the power button and X on the keyboard.. It's still at the M screen..