I really want to learn how to play sad/melodic songs like this



I don't have much money and am currently living in a college apartment, I won't be able to move my keyboard or whatever I get over summer.

I have a macbook pro so that can teach me how to play I think?

Should I start off with a cheap keyboard until I get the basics down? Any recommendations?

Kinda hard to be self-taught with a piano if you wanna become even remotely good (and I don't know playing 4 chords and singing every radio song in the world, I mean actually "good").

It's essentially like guitar tho, practice fingering, scales, reading music and put a lot of time into it.

I pruchased a 25 bucks casio keyboard. Sounds like shit but playing it is so awesome. It's great for learning I guess. In a year or two I'll invest into a better keyboard (yamaha, ~ 1500$).
And maybe I'll be able to play like CMBurns in 15 years