Hi Linamar,
from me too!
I think Elaine has given you some great advice regarding native Orchids of Florida and I agree, you may have to travel some distance to find a garden with a large selection of native orchids. I googled for a list of Florida Botanical Gardens and got the following with a map and addresses:
https://www.google.com/webhp?s...
Good luck with your effort and I hope you'll come back and share photos of your paintings!