It can get better if you practice consistently each day, things like reading aloud, rapping, breathing exercises, practicing talking in the mirror can help mechanically your way of speaking. Ig for like self esteem stuff u just kinda have to put yourself out there more and more. It is rough and painful to do that but if u want to get better you have to try to interact with more people, but trust it gets easier eventually and you naturally get more confident and comfortable talking to other ppl and speaking in general . There is no definite cure but it’s definitely possible to reduce your stutter, it just takes time, consistency, and effort