[NuggleBuggins]

So i'm pretty new to the digital painting scene. I am trying my hardest to get better at it, but I've only used pencil for pretty much my entire life. I desperately want to work on becoming a concept artist and i feel like digital painting is a must in this profession. I started working on my first piece, just to kinda mess around with techniques and figure some stuff out. Opacity is a real problem for me. ive watched so many tutorials on people making amazing master pieces using just colors and opacity, not even a base sketch, and it blows my mind. But anyway, if you all could critique what ive done so far, and give me pointers and tips, any kind of helpful information would be great. Also, what is a good brush to sketch with? ive tried alot of different ones, like soft and hard round opacity, airbrush, soft and hard pressure, etc.. but if there is a specific one that is better for sketching id really like to know.