what I need to learn if iwant be front-end

Answer 1

oops!
lol
OK u most learning html, css, Javascript for first time

Answer 2

If you want to be a web fronted developer start with:
HTML
CSS
Flexbox
Javascript
And then continue with what you think is better for you (I do prefer react by now!)

Answer 3

لا اخي هدول تبع ال backend

Answer 4

php, nodejs, mysql