I was once your age (I feel old saying that, I’m 28, lol) It was a scary time to communicate with other people and finding work. It’s definitely tough living with this impediment. It’s something you have to learn to accept that it may or may not be a part of you forever. Personally, I try and talk as much as possible. Doing so helps alleviate the fear of speaking to people, boosting your confidence. If as you say your stuttering is psychogenic, then there’s a possibility that you’ll grow out of it. The only true way of getting to that point is by working on yourself. It takes a lot of time, patience, and frustration. Maybe you could benefit from therapy and I don’t mean speech therapy. The best way to tackle this problem head on is to figure out what caused it in the first place. Everything is easier said than done. I can’t say I beat this thing, but I’ve gotten a lot better at managing my stutter and my emotions. I often wish there was a cure for this but I’m semi grateful for it because I wouldn’t be the person I am today. I hope this kinda helped.