Where is everyone learning AI from?

Can anyone share some online AI courses? I'm interested in both free and paid options. Where do you all learn AI? Do you learn systematically? I often see many experts on Facebook and Twitter creating amazing images, animations, games, presentations, websites, etc., and I really want to know how they do it... But sometimes when I watch related videos on YouTube, I find them too technical and can't understand them... I feel like I don't know my interests or what to learn, and my learning ability isn't great either. I just see amazing works from others in the world that attract me, making me want to know how they are made?