How to help with social anxiety without prescriptions?

Exposure. Exposure therapy, dale carnigie courses, cognitive therapy.
Skills-Based Help. See this page of Anxiety Disorders Assn of BC which contains educational & self-help tools (incl. a video) for managing & even overcoming social anxiety: Effective treatment for social anxiety will involve putting yourself in feared social situations, going from ones you fear only a little to others you fear a lot. A CBT expert coach can be big help!