2d game design graphics

hello i have some questions for 2d game design graphics
how many month or hours i will learn for havinf a good level in this domain ?
can i earn some money when i will had learned this domain ?
can you suggest mee some free curse for learn this 2d game design graphics becuse i didn't found any curse in google and youtube

There are many courses in youtube,just search it there.If you are looking for paid their sites too.

Just rip and edit sprite safest and hq way