Any tutorials,art supplies?I want to make good art for video games (manga,comics).

continual practice. It does not matter with what. Again, again and again.

Maybe check this out first and then we can talk.

Actually drawing a lot, challenging yourself with projects and completion, and getting feedback from folks. If you take an art class and it'll force all of that onto you.

https://drawabox.com/ is pretty useful for starting from the beginning and developing skills. After that you just pick what you want to draw and practice, practice, practice. If you want to be good you'll have to do it everyday and build a habit of drawing.

Hi. I think it depends on exactly what you want to draw.

If you want to draw stuff like manga and comics, you would need to practice human anatomy.-- proportions, foreshortening etc. Buy books or watch videos on human anatomy for artists. Practice a few hours a day, and once you have mastered anatomy, then you can start working on developing your own drawing style! 

One of the best tip I ever got, was to use thin lines when starting each new drawing. (Not press so hard.) That way, the drawing "evolves" out of a set of thin lines (as you start emphesising the best one). Glhf!

Practice and Discipline ... I lack Discipline and have no time for Practice sadly.

Recently I had the epiphany that the reason you need practice is that it is not sufficient to read, see and be told that the head is sphere with a wedge, that the torso is a sort of cylinder, hands have the length of the head, that the spine has an S shape and that the legs have a slight inward incline as you go down from the pelvis to the feet among other things. No, you cannot just know these things, you need to "feel" them and be able to construct them, and for that only continuous practice will get these techniques etched into your brain. That and use a LOT of reference until you build what is called a visual library, until then you'll only get frustrated trying to draw from memory.

Hope this helps even if my own art is subpar, again, I blame it on my lack of discipline and time ?.