Read this textbook, I can assure you that it is better than any online class or resource you will find, I'm dumb and tried a fair number of them before I read this. It was recommended to me in a very similar thread I made a long time ago and my only regret is that I never thanked the anon that posted it.
Also, I think python is the best language to start with, but since this book is open source there are many different versions of it for other languages if you need to start with something else. In fact the book was originally written for javascript and modified to be for python, but the python version became much more popular because javascript sucks dick.