Hi Reem – welcome to the Academy. I’ll try and answer a couple of your questions. What Richard wants to see in your sketch is the shape of the bag and any details that are on the bag, seam lines, straps, pockets and maybe any hardware. Most of us can’t draw but it also helps you to a clearer idea of what you need to include on your pattern.
When you make your pattern you need to make notches on the corresponding pieces that are joined together -these notches are also marked on your material so when you join seams they will meet up in the correct place.
You will find a short video explaining how to submit your assignment if you look to the right on the beginning handbag course page.
Hope this helps a bit.