Cool man...those oils you did are not even close to being done A good oil painter will layer hundreds of layers to get the color to pop...But if the customer is happy buying a simple under-painting, take the money and run.
Yes mania and painting is a good hobby. I do it myself. Currently not doing oil, because I've got some acrylics to use, but I honestly hate them. They don't flow or layer, they are difficult to apply a transparent layer. You really shouldn't be smoking next to an open turpentine can.