Joella...Start simple..maybe with Christmas deco or ornaments. l like to travel to craft shows & get some ideas. You can either purchase for pattern or ask if you can make a picture. Crafting is si much fun to me & l love giving gifts that l make!
Joella: maybe these will help
Saleable crafts are various but some we have found that sell are a few: reusable shopping bags, school zipper bags for pencils etc, girls tops with a little bling added, specialized notebooks, cute tourist type relics such as "bubble bath" with a few beans in a bag and instructions "cook, eat, enjoy" on it (printed on cute stock paper and stapled to the top) , or children's toys such as we used to have like a rubber ball attached to a paddle with an elastic string etc.
Visit your local craft fairs and see where there is a need for a different type of product, or how you can improve upon an idea already out there. Spend some time, and poke around on Pinterest to see what you may want to try.
mod podged coasters, decorated wood frames, jewelry and wreaths all come to mind!