I would like to take a course on alternative energy sources, where can I find such?

Wow, wow! You mean renewable energy, right? Who protect our ecology? I know of a great portal that focuses on environmental issues. Here you can look for climate focus jobs https://www.climatechangecareers.com/, various articles and courses that will help you dive deeper and deeper into pressing problems, and possibly become one of the participants in its solution. Each of us can make a contribution to the preservation of nature and purity on our planet, I believe.