depending on where you live there are lots of choices, the top name I can personally recommend is the Haystack Mountain school in Maine. It’s more artsy than craftsy but may be just what your looking for. Check them out, and if that’s in the direction you think will help you that might start the ball rolling.
There’s also the Acadamy of Art University, a chain of schools across the country that wont require you to enroll full time and can give you an intro to design skills.
you may want to post this question to the furniture forum as well