Go find a speech pathologist or therapist, I’m a 28 year old male and before I went to one my Speech was so bad, I started 2 years ago, I still stutter and my days fluctuate but it’s much better, you can try to use bing AI which is Microsoft’s ChatGPT for the internet, search for a speech therapist or pathologist, They usually work at universities but sometimes are private, you can also watch YouTube videos to work on speech techniques and strategies such as slow rate(speaking slowly), chunking and pausing- speaking in bits and pausing, almost like having a rhythm. Hope the best for you