I so feel what you're saying. That describes me to a "T". I wanna master everything in one day. Talk about the impossible.
So, I'm still not totally comfortable or confident, but after a handful of different classes, tons of books and magazines, printed stuff off the Internet, and on and on, I just decided to experiment with different pieces, shapes, colors to build my confidence. My little "samples" are all jacked up but the experience was invaluable and sparked excitement into wanting to try/do more.
Try to sit and not think deeply about what you're doing, just sew and get lost in the sound of the machine. I promise it won't be long before you are whipping up some amazing project to share with us here. :thumbup: