What's your goal? Fast.ai is good if you want to create models

I am a physician as well. It really does depend on what you want to do. Do you want just understand? Or do you want to build? Most medical folks are just end-users of AI, but an increasing number are needed to help guide policy and development. Stanford has a great series on AI in Medicine and I'd look there. Coursera has courses in medical AI, and is where I cut my teeth. If you have no coding experience or any AI background, then taking ML engineering courses at nVIDIA might be too much. Start with the basics and work up. Send an email to Sarah Gebauer and get on the Slack channel (https://sarahgebauermd.substack.com/about). If you're interested in medical startups, Sergei Polevikov has a great substack (https://sergeiai.substack.com/). Also, start doing this with AI. Get an account at poe.com which is probably the easiest way to start doing this with AI. You can use do more advanced things with their API when you're ready. Doing things will help you learn the concepts.