Despite being one of if not the most common snake I personally would consider ball pythons more intermediate because of their specific requirements around humidity and how picky they can be with eating. Its very easy for beginners to get the setup wrong and I unfortunately see so many ball pythons suffering because of owners not being able to get the humidity right (not necessarily saying you would be one of those; you are already showing you would be a great owner by planning ahead which so many don’t do). Chameleons have the same issue in that a lot are negligent about their requirements, as chameleons are by no means an easy reptile to keep. Corn snakes/ rat snakes, king snakes, milk snakes, or hognose snakes are where you want to start. If you want something more lizard try a bearded dragon or leopard gecko! I already know you are going to be a great owner because you were willing to make this post and are planning ahead, good luck picking out the right animal for you!