Photography is all about light. The definition of photography is "painting with light".
The easiest and quickest way to improve your outdoor photography is to work early and late in the day and avoid midday light on bright sunny days. Lghting is the key to quality photography. Learn as much as you can about lighting. I teach several courses on this extremely important subject.
Digital RAW files are available for sale to art directors, editors, publishers, photo researchers, stock houses, advertising/public relations agencies and other interested individuals.