I'm 34 and have completely wasted my life due to fear. There were a few years where I was actually happy because I didn't care about my stutter but then a series of bad life events that were all blamed on my mental health and stutter had it all crashing down and I never recovered. So really, my only advice is don't let yourself stay down when you inevitably get knocked down. Get back up because you will make something of yourself. I can guarantee it.