As a beginner, which one should I study first?

Answer 1

Roll the dice... It really doesn't matter

but at very first...learn to use searchbar.
first exercise: Find 100 similiar questions on SL😉

Answer 2

I will suggest you html it is easiest I guess:)

Answer 3

Frankly, you should study using the search bar. A programmer needs to be able to look things up to make sure his question has never been asked before.