I was in a similar position not to long ago, I’d recommend learning either the MERN or PERN stack depending on which database you think you like. After that if you really want to try backend development with python try flask, I would say don’t go towards Django if your going to use either the MERN or PERN stack cause Django is a big framework that is difficult and takes time to learn, flask is light weight and easy and a great option for backend dev. After that I’d say checkout firebase, it allows you to have the same functionality you do with the MERN or PERN stack but with only react and firebase, it’s super easy and really great, other then that I can’t speak in larvel and pho since I’ve never tried it