It is an example of tempera. The vehicle used is water and the binder is egg yolk. Picture 2: It is an example of gouache. The vehicle is water and the binder is gum arabic.
I'm an amateur at digital art, so my suggestion may not be as useful to you. I suggest using the RCA Cambio, It's 32GB and comes with Paint 3D. It's also a laptop/tablet hybrid, so it's good for other things too. I got it at the affordable price of $120 at Staples