Why not go to a LQS and ask for help there (for a fee) of course. They may be able to do the basic planning for you and show you how to complete it step by step. Sometimes stores have open sewing classes where you can bring any project you want and they will help you along through your project. If tackling this is to much for you it is worth a try.
good luck any way you choose and sending you a big huge hug and a thank you for your son.
peace to all