Any Breathing Practices / Practices that seemed to work and help you ?

Any Breathing Practices / Practices that seemed to work and help you ? Hey guys i cant afford any form of speech therapy, so i wanted to ask if anyone knows of any breathing exercises or just exercises in general that can help you with your stuttering ? i feel like one of the reasons we stutter is because we don't seem to breath properly and i feel like trying to improve on that first and to go from there is a good starting point. So if anyone knows any exercises please let me and the other who find this post know