Based off what you like...And depending on where you live...It could pay off for you to learn both graphic design and audio engineering...The design you could do freelance....The engineering you would need to get in the door at a good studio before you start making decent money, so that's why it could depend on you living in a bigger city with a music scene...Depending on how far you go with it, you could een combine the two and start making your own anime on youtube and monetize it...Since you like gaming you could also try tournaments and/or monetized game streaming...
Based off what's actually necessary in the world right now...And in order of time and difficulty(I think)...Mechatronics, IT, Nursing, Legal, Accounting...I'm in mechatronics, it's not very difficult to get a two year degree and you'll typically come out makin about 50k if you get with a good company...If you have manufacturing plants in your area, they need people to maintain the machines...Folk in the other fields correct me if it takes more time to get career worthy skills than the other ones...
And then of course, if you have some money saved up and the idea of working for yourself interests you...You could get into things like retail arbitrage, drop shipping, real estate wholesale, debt collection, tax preparation...If you can cook and have a way to get food for a cheap price(find somebody with stamps) you could start selling plates...