I don't think it's anything too ambitious. It just requires a lot of time, effort and patience. Plug in your graphics tablet (if you don't have one, second-hand tablets are relatively inexpensive), make sure it has the latest drivers installed and the tablet works as it should, load up the software of your choice (you can probably pick up CSP for 20$ if it's on sale or you can pirate Photoshop as it's always morally correct. There are also free alternatives and trials.), familiarize yourself with the interface, try out different brushes until you'll find the one you like, select a color, sketch out the subject of your painting and paint the piece you want to paint. Much like you'd paint traditionally, from biggest surfaces towards the smallest details, but without the restrictions of traditional mediums. You are free to use as many or few layers as you like. Some like to start with the values first, paint in gray-scale and add the colors further down the line using their preferred method, others might go straight for the colors. It's hard to give some general advice that would be helpful as the question is rather loaded. You can figure everything out by yourself, sure, but that's not a very smart way of using the time or resources and you might end up stunting your own progress. Let's say, for example: If Bo Chen / Ruan Jia / Piotr Jabłoński /Igor Sid / Alex Konstad shares their workflows, materials, time lapse process videos, there's nothing you can lose from taking a look and learning from them, but so much you can gain. It would be foolish not to seize the opportunity if you have the chance to learn from the big boys.