How to deal with being socially awkward at work?

I [24F] started a new job. I’ve been here 6 months and I work in an office. A critical part of my job is communicating quickly and effectively and getting info to people fast. I LOVE my job and it’s what I always wanted to do – the problem is that I suck when it comes to speaking with people!

I made a phone call to a person and messed up some of the info that I’d given them because I was thinking about something else. I didn’t bother to correct myself because the person over the phone did not seem willing to help me anyways. There was a lot of accidental talking over each other as well. Now they probably think I’m bad at relaying info and won’t reach out to me anymore. I feel like the social awkwardness could have been avoided in an email, where I can say everything I need to say, in my own words at my own pace.

I have always been introverted and socially awkward. I turn red easily and stutter when I am put on the spot. It cripples my self-esteem because I imagine myself being better.

Is there any way to fix this? I don’t talk much with my other coworkers to begin with, but I need some way of making myself more comfortable with the situations I am put in. Advice is appreciated.