hi i am also a painter learning about game design and trying to develop some of my own stuff :)
i think what style looks best really depends on your game and the atmosphere you want to create! The same for easiness, whatever you are most used to is going to be easier. if you are a painter both might suit you well! i have found that with painting and pixel art many of the concepts are the same.
if you are also interested in pixel art this tutorial is really good! https://forums.rpgmakerweb.com/threads/spriting-pixel-art-tutorials.33/ it helped me out when i first started