Join toastmasters. It's an international club created for the purpose of helping members become better at public speaking. There is some theory and coaching, bu

Join toastmasters. It's an international club created for the purpose of helping members become better at public speaking. There is some theory and coaching, but a lot of it is just giving regular small and large opportunities to speak within a structured environment. If you don't have access to that, join an improv troupe, a theater troupe, a local group that tries to educate the public on a political issue you care about, or some other group related to your interests where there are opportunities for discussion. I do recommend toastmasters if it's something you have access to.