Dale - you’re learning there’s no such thing as a free sailboat! Those are really old design Thistle sails so of very limited value.
Do you live near a local Thistle fleet? If so, check them out and arrange to crew. You’ll learn a lot and have fun and really decide if a Thistle is the boat for you.
In my opinion the Thistle is a great boat both for racing (top competition with some really great sailers) and simply having fun on the water. Very fast in light wind; great rides off the wind when it’s blowing but can be a handful. It’s not for everyone so connect with some locals and give it a try.
If you look on the Thistle class web site classified section you’ll find several older glass boats at a very reasonable price that can get you on the water immediately. But, as stated above, don’t purchase anything until you’ve had a chance to sail on a Thistle and others.