Choose a subject you are interested in, otherwise it won't seem fun to paint - it will be uninspired and feel like a chore. If you are unsure of what interests you, then you have some self-exploration to do.

Many aspiring artists get stuck in the rut of copying work from artists they enjoy but when attempting to create a piece of their own, they fall short. There is nothing too wrong with this in the beginning - the main problem comes when this is repeated and becomes habit. Now that we know one of the problems, we can fix it before it happens.