I'm getting near 60. I've noticed that most UR bassist started by the time they were teens. I "play" fretless and enjoy it. I like the feel, the in touchness of it all. I can't help thinking that an UR would be more of the same. I also realize that it's a big investment in time and money. Should I grow up and give up or is there a better than 50/50 chance that I could learn to play an UR?