I think you're off to a good start. Whatever you're doing is working for you. I do feel like some of your work is a little inconsistent. Sometimes your values are great and sometimes they are just okay. I would work on that a little more. Also, with post #8, the alien creatures arm that is sticking out looks really awkward. Like it's not connected to his body or something. Since it's under his cape, maybe show some slight folds in the cape to make the arm more believable.
Hey man, that first tiger you did looks really great with the textured brushstrokes and the stylized approach. Looks like something out of chinese mythology. Some of your sketches look kind of flat value and color-wise. Also the underwater painting with the naga-thingy lacks a focal point. Feels like I'm all over the place! I like that you aren't afraid of sketching away what you feel like drawing. So keep it up man you've started off great!