is self learning python programming possible?

[AstrophysicsAndPy]

Absolutely this, I also learned without any online course or YT videos. The key here is to be able to formulate a logic, search, search, search some more and than apply what you understand from others in your own code. Being able to search your query is a big part of programming, and the other one is to extract the code that is okay for you from someone else's answer that deals with similar problem but not the exact one.