In any kind of long-term project, sometimes one needs to switch tasks. It is no shame.

In a hobby context, one needs to make sure one is enjoying things. If it isn't fun, it's not going to last in the long term, and then one isn't saving the world.

One should always measure one's satisfaction based on what one has achieved, and not on what one might have done if one had done something else. Real achievements count, fantasies don't.