All right, this isn't a sewing phobia actually, my first project was a circle skirt with a gathered elastic waist that was made in a fiendish stretchy knit that had the capability to run the way nylon stocking do. And it doesn't look half bad though I don't dare throw in the wash.
ANYWAY, that's another rhinocerous all together. My current project is to sew two costume pieces for a renaisance faire on May 12. One piece is a surcoat to be worn over an actual shirt of chainmail for my boyfriend. I have no pattern, though it's a simple design, and the material is thin stretchy velvet which I predict will take some very careful sewing. I have measurments from my boyfriend for shoulders, hips, waist, and length, and he was supposed to make me a simple mock up garment from a sheet but never did and probably won't.
The other costume piece is a cropped shirt for myself as my costume has more of an Arabian inspiration. This is easier as I am reconning a t-shirt and I will be able to put it on and pin it whenever and whereever I like, unlike my boyfriend's costume because I only see him about once a week due to work and school.
Below is a VERY basic drawing of what both garments will end up like. What I need from you all is advice on how to proceed with no pattern, very little experience (despite the fiendish skirt described above) and some words of wisdom on how not to ruin stretchy velvet. We're not trying to hard for the most perfect or historically accurate garments, we just want something that'll look pretty good.