Advice, how to get over the fear of making outbound calls?

I REALLY need help. I'm questioning if I am even a good fit for the banker role. I'm very introverted and have social anxiety. I need to make outbound calls but I'm TERRIFIED. I overthink. Idk what to say. What to talk about. I'm scared they're gonna yell at me or cuss me out. I'm scared of them having a question i wont be able to answer. I know i have to make calls cuz it's part of the job but i just don't have the courage to start. Any good advice would be extremely helpful. TYIA.