Want to paint in oil? Learn to paint in acrylic first! Why? The paint dries easily within a range from five to fifteen minutes. If a passage is not quite up to snuff in terms of color, value, rendering or whatever, it can quickly be painted over without waiting a week for the paint to dry!! Yep, learn the ropes of opaque painting and then segue to oil (if you want! - you may want to stick with acrylic like me).