Hi Klein. I didn't get my degrees as a "mature" student. I'm as immature as any other student. To get a thesis accepted in pretty well any accredited university you have to do some sort of fundamental research. It can be a literature search that has not been done before to conclude something...
What you dream of is not impossible. I finished undergrad at 35 and postgrad at 55. It depends a lot on why you want to turn your dream into reality. Is it for your personal reward or to make some contribution to humanity even though you may well be unrecognized? It is a very long path. If you...