Your accent means you know more than one world. Speak up with it.

An accent is evidence of a second place, a second language, a whole set of things you can understand that people with one language cannot. Hearing it as a flaw is a habit picked up from rooms that treated difference as a deficit, which is a fact about those rooms rather than about your voice.

Speak at your normal volume. Repeat the sentence rather than shrinking it when somebody asks. Anyone worth talking to adjusts their ear, and most of them are quietly aware that you are doing something in their language they could not do in yours.