I won’t lie bro, for personal experience, me n u got the same type of stuttering. I’m 20 at the time of writing this. When I was your age I would hide and distance myself from potential friendships or opportunities just because I was embarrassed of my speech blocks. What you gotta do is not make your stutter your whole personality. Everyone im close with didn’t even realise I had blocks until I mentioned it to them. Be as confident as you can be. Don’t let some bad moments or days overtake your good moments of fluency. Most people don’t give a fuck if you got blocks, if it’s the same type of blocks that I got which from your post, I can relate to. You ain’t got a lot to worry about. There’s levels to this stuttering thing. And luckily for us we are very very close to the bottom of the spectrum compared to severe stuttering where people struggle to get a word out. To end it off brother, confidence is key, don’t let this overwhelm your whole personality, read books 1 hour a day out loud. What I like to do is, I like to get into uncomfortable situations so that anxiety and nervousness of potentially having blocks will slowly reduce with time. So calling partners or friends. Trust me bro, if you do what I done, where I just shut myself out to the world and lived in my lil bubble of just hoping one day I would speak normally. It’s going to get worse and worse. If you need any advice. Shout me, because we got the same issue and I wish I had someone to tell me when I was ur age. God bless, brother