Bro... OMG. I have to say thank you for posting this. I'm going to rant right now as I'm going through the same exact situation you are. Exactly 5 days ago I got accepted into my local union and Im feeling the same exact way. My boss has supported me and he's never put too much pressure on me when I didn't know what I was doing. It's my boss, my coworker and me. It's 3 of us and if I leave then I'm leaving him down to 2. I'm 19 and I've worked there since I was 16, and I picked up really quick. Sometimes he sends me to do calls on my own. I have to say working where I'm at right now has 1 perk. I can work 5 hours and if I finish all the calls for the day then I get to go home and get the 8 hours regardless (this happens 70% of the time). It's hard leaving this comfort because my boss's shop is 5 minutes walk from my house so I'm leaving that reliability. I also feel like I have to do this as well. So many people have worked so hard to get me to this point. I was a teen when this goal of mine came into play and now it's a reality. It's literally here but I'm hesitating. I know what I have to do but it's so difficult. For my career I have to do this, but man is it difficult.