Dont try to overcome it. There is nothing to be overcome. You can visit a speech therapist to be doubly triply sure about the origin of the stutter( unless its a rare physiological cause which can be medically looked at). Explore your interests as a 22 yr old human. Humans ruled the world, we have the most developed brains. We are the most powerful creature on the planet. The same brain which can rule the world could let you surrender against its own abilities. Smile more, be happy just for existing , there are worse human inabilities out there. Find time to explore, be happy, explore your interests and earn more money(not all professions are speech heavy, esp not the HIGH PAYING ones) The less you focus on it the better it will be. I can recommend some videos which helped me get a stark shift on my perspective, only if interested. May God bless you!