How you approach this depends a lot on what you(and your mother) want to get out of his work. If you want money you can offer samples to a recognized publisher. We have a few people on site (not myself) who can give you some advice on how to best approach that effort.
If you have a vision for how/who would benefit from these cartoons for little or no money, then that will dictate your next strips. Any decisions you make should be made together with your mother unless all rights have been sign over to you.
Here are a few examples of the comics.
Interesting. These look ideal for coloring pages for a Sunday School class. You might try taking some (10?) of the most engaging pages and let a Sunday School teacher try them out in their class, as a field test.