I just hemmed both sides (folded over twice to hide raw edge and put a row of stitches).
Then, sew on zipper with the edge of the hemmed fabric as close as possible to the zipper teeth, without overlapping them.
I ran the zipper almost all the way to the top, and then put the reinforcing peak circle of fabric over the top of the zipper. This spot is usually the most difficult to make look good.
Not too difficult.
Learning to sew on a zipper is a good skill : )