I am a fan artist I love World of Warcraft, Assassins Creed, Skyrim and Legacy of Cain adn Soul Reaver. All Hentai you see here is my creations. Enjoy!
I'm inclined to agree with IvanGo. Instead of looking up "how to" videos, which will teach you their style only, look up speedpaints of different kinds of artists and find what coloring style works best for you. Personally, I think your linework begs for an advanced cell shading, that artists like Slugbox and Cupcakedrawings do. But don't let my reccs limit you, you have great potential and will produce some amazing work given time.