How do I improve my stutter?

How do I improve my stutter? Heyy new to this sub and needed a little help. Ive noticed I mostly stutter with words starting with alphabets "L", "R", "T","D","N", basically the ones that involve the tongue touching the roof of the mouth. iTs horribly embarassing because my name starts with R and I cant even introduce myself to anyone new I meet and as a result just prevent conversations on a whole.