Most classes on this site can be appropriate for both! Your instructor sees crafters as artists – and hopes to help all who create to see themselves as wonderfully creative human beings on a journey.
Stampers: many stamps go out of production over time, so classes here have begun to take that into account. Classes may have downloadable images to work with, templates to trace, or instruction on how to draw simple images yourself. You can always look through your own stamp collection to see what you have that would work with the technique in the lesson.
Fine artists: Some exercises in some classes involve coloring stamped images, or practice paintings at a size appropriate for a greeting card. Adapt the assignment as you wish!