When you posted that you're 20, I immediately realized you're from US.
Especially in Europe, tons of kids take a gap year after high school to travel. Some rail it around EU, some go to SE Asia, some overland Africa, and I'm sure some do RTW and some of those do it by moto. It's just that not everybody posts a ride report and self promotes their trips. Most people on the road are not posting anything on the Internet.
Should be a great experience as long as it is something you want to do for yourself, not for others.