If you want to start, starting is the thing that matters.
And where you are is the only place you can start.
It's ok if you do things badly.
It's also ok if you don't do anything at all. That just means you like the idea of doing the thing more than the actual doing. Enjoying an activity despite doing it poorly is a clear sign that you are actually interested in doing the activity.
I mean putting wheels and motors on a robotics book might be the best way to start. Good luck.