Hello and welcome here.
About drawing and animating, you can take a look to this thread : Old timey cartooning resources .
Also, you can also found svg images and convert them to synfig file format (.sif) with inkscape, inkscape can vectorize raster images, you can scan magazines/comics/treeleafs and animate all that … the technique is one thing … the idea/concept is even most important!
Good luck, good work…