You'd also want to map something more convenient to ESC. Like jk. That way you won't have people immediately cursing this system that requires them to find the ESC key every time they finish editing a piece of text. Something more convenient can be mapped to :wq as well.

Actually....I think I'm with vukmir on the beginner in education being somewhat overwhelmed and I'm confused as to why Linux Server skill is being conflated with programming.

"consider Levinux a stepping stone for newbs, because it gives you a taste of Linux Server and sets you on your way to being able to do SOMETHING within minutes......Push your code up from Levinux and pull it down from whatever other system you end up using in the future."