I'm just getting into robotics with a background in software and I ended up choosing the Isaac Sim platform/ecosystem (https://docs.omniverse.nvidia.com/isaacsim/latest/index.html) and Jetbot (https://jetbot.org/master/) since they seem suited for neural networks and reinforcement learning. So far getting up and running with the simulation side hasn't been too bad and there is a model for the Jetbot in Isaac Sim since it's also by Nvidia. I haven't started on the hardware side so can't speak on that. The downside for some might be it's proprietary and Jetbot itself is a bit out of date and nearing end of life support.