The Coursera AI course videos were good a few years ago. You could audit to see those for free. Don't know if that is still the case. It is probably a good idea

The Coursera AI course videos were good a few years ago. You could audit to see those for free. Don't know if that is still the case. It is probably a good idea to go through all the courses since that reinforces learning. Good introduction to back prop, ReLu, batch norm, attention, GANs, etc...