Despite many claims you cannot assume that any one language will work for every different OS and platform. And as someone who is new to development it is not something that you need to be concerned with. You should focus on one platform and one language to gain experience first. That should give you a grounding which will help you move to other systems later.
Python is easy to learn, and does work for many situations so is a reasonable choice to start with. Go to
The Python Tutorial — Python 3.9.7 documentation[
^] and see how you get on with it.