Looking for training!

Hello all! I live in Southern California and I have a company called UrbanFarms & Permaculture with the goal of converting private property into edible landscapes. The business is doing well and there seems to be considerable demand for the service but I'm looking to branch out a little. Being that I live in a place so hard hit by drought, I'd like to hone my skills in that area. Is there a drylands/native plants landscape design course or a general online landscaping course anyone could recommend/has vetted? I'd like to walk away with a degree or a certificate of some kind. Any help it much appreciated! Thanks!

The only course that I have taken so far is a Permaculture Design Certification Course with The Permaculture Education Center online, and I really enjoyed and found the course very informative.

-EDIT: I know, tons of edits... lols! I get very talkative which is kind of a problem, but most people around me enjoy it. I tend to get very enthralled in whatever is being discussed and tend to say or write too much. So I edited this to be concise- recommending what I have taken so far.