What Have I Got Myself Into??

I wish I could say that my sewing room looks this neat! HAH! Right now my sunroom has becoming my sewing headquarters. And it's a mess! My intention was to make a "dummy" model of the outfit I'm going to make for Andy's wedding. First attempt: Jacket - Outcome - I made two right armed sleeves instead of a right and a left - GRRR! and I decided even if I did it correctly I don't like it--collar sticks up too far - abandon that plan. Second attempt: Try the pattern for the skirt - skirt's too short for my liking - abandon that plan. Went to Joann's to buy a different pattern - started the jacket last night - I'm using an unused bedsheet to make my dummy copy - so far so good - except that I'm having to do quite a bit of pattern adjusting - I wanted the jacket to be a little longer than what the pattern calls for. I'm hoping this one will be JUST RIGHT! If I get too nervous to cut into the expensive silk for the real outfit, I may just wear a bedsheet to the wedding! :)