Awesome. Once you get through the mending, def learn how to sew from scratch (or re-work thrift store finds). You can make easy things like tops, skirts, all knitwear. Just be careful that your new hobby doesn't wind up costing you...there always seems to be pretty fabric on sale. Still working through my fabric stash before I'm allowing myself to buy anymore!
Have fun with it and congrats on your excellent find!
Maybe even do a little mending on the side to make a few bucks??