Beautifull quilt and it deserves the time to fix it. As far as maching quiliting, go for it. Start with simple quilting. If stitch in the ditch doesn't work for you, just go with lines across or on the diagonal and as you get comfortable try free motion. I am not great with free motion but I do it on every quilt. What I usually do is try in a smaller sandwich to see if I can get my brain and hands synchronized to do what I have planned- then I go to my quilt.