Sorry about your accident. Glass work isn't very difficult and you don't have to get it right the first time. There are lots of books on it.
Briefly what I do is cut out the crack with a jig saw or similar, line up the pieces and pop-rivet screw small strips of aluminum to hold everything in place (probably put the aluminum strips on the outside). Then glass the inside with mat. When that is cured, drill out the aluminum strips and sand down the area of the crack to accept a layer or two of mat and glass that. When that's cured, sand and fill (it may be blasphemy but you can use Bondo here but it's better if you use fiberglass filler) to get the correct contour. Then paint. You want to try to have as few bubbles as possible (use the end of a brush).
You want to have a lot of acetone handy. Pretty much any tool you use you should expect to throw away so get cheap brushes.
I think everybody has their own technique, and mine may not be the best but it has worked well for me. I'd be glad to give you more detail if you're interested.