Welcome! 
I’d start with the tutorials on the MakeCode Arcade homepage, and then really the best way to learn is to make games and look up new code / ask for help if you need to learn a new method for your games! 
8 Likes
The best way to start is to experiment. Look at others code, and see if that rings your bell. If that doesn’t, then just do the tutorials. Time to time, come to the forums if you need help. Who knows? You may be the best in the world!
5 Likes
You’d want to learn the fundamentals, this includes variables, functions, loops, various data types, all that stuff.
Knowing the fundamentals allows you to do so, so much other things once you get introduced to modules, like what you see in Python.
1 Like