Hi,
Can you go to your local bike shop and have them put your bike on a trainer and let you practice clipping and unclipping (15 - 20 minutes?). You can't fall over that way. Also, let them adjust your clips so they are at the least amount of tension so you can easily unclip.
This would also get some other "experts" in the loop so you're not dealing directly with Mr Man. Even if you didn't buy your shoes and clips at LBS they should help you if you buy some other gear there (we can all use some extra socks, a blinkie nite lite, etc.) Plus, you'll need a new bike sooner than you think!