Learn ROS. It has tutorials using just turtle sim. Also https://www.theconstruct.ai/ is a place designed for people who want to learn robotics (based on ROS). https://www.youtube.com/@mikelikesrobots also has some nice beginner videos.
Learning by doing is the simplest thing that might work. Doing is the way to start doing. Doing things wrong is the way doing usually starts. If you are exceptionally lucky, doing very very badly will be where it starts. Irregardless, where and how you start matters not relative to just starting.
To put it another way, it is not rude to suck at robotics. Good luck.
Buy one of many Arduino kits. You will learn electronics, some mechanics, and more robotics aimed programing skills!
https://news.ycombinator.com/item?id=41070703 https://news.ycombinator.com/item?id=35441180