If you don't know any, how do yoiu know it sucks? Or is it just that anything you don't understand or can't do sucks?
Certainly, it's your life and you can do whatever you want. But it may be more productive to stop thinking of learning to become a musician as a series of sequential steps ( first I learn this, then I learn that, then I learn this other thing) and try to find a teacher who is going to put together a program that is going to CONCURRENTLY work on a lot of skill sets: conception and understanding of what you are hearing (ear training and theory) and the ability to identify, locate and execute on your instrument what you are hearing (technique). The amount of work you need to put into these areas is solely determined by what kind of musician you want to be. If it's not about being a musician but just playing bass when you feel like and not trying to get any deeper, then you don't have to work very hard at all.
"Fun". I love it when people talk about this. You play any sports? Throw the baseball around with yer pops or buddies? Some people do. Some people have fun getting together every once and awhile and have a pickup game of baseball. Cause they have fun doing it. And they have that fun without doing ANY work on strategy, fitness, play coordination etc.
Randy Johnson has fun playing baseball too. And he has a whole panoply of coaches, trainers, pre season games, warm ups, physical therapy, computer analysis of his physical approach etc. All designed to help him realize his fullest potential as a baseball player.
So he can have fun.
In 20 years, when you look at a picture of yourself now, holding a bass, and realize that you would have really liked to still be doing that or would like to have gotten somewhere with it, how much fun is that gonna be?