I don't recommend any of those platforms another recommend you and one thing I highly recommend as someone who passed through the path is Harvard course. You hear me right simply start with Harvard introduction to programing with python course in edx them move to Harvard's CS 50 course both of them are free and they will tech you to build your first full stack app with python and the certificates are very useful if you want to work in Upwork or get employed you can add them to your LinkedIn or resume. The last thing I recommend is Harvard's Ai and machine learning course you doesn't to be ai engineer to take this course but it will tech you more about object oriented programming and the lat last thing is after all this take some algorithms and data structures course from priston university they have good course Wich they teach it in java so go ahead stat your journey the main thing if you don't have to remember everything and chat gpt and google if your friends.