How to get rid of nervousness before a date?

Maybe a couple weeks ago, my best friend had a friend that just became single. She’s very pretty and I asked her to put a word for me in which she did. She showed a picture of me to her and she said I’m cute and wants to get with me. I was texting her a decent amount for the past 2 days. I then asked her if she’d like to go to a mall and get food and chill there. I wasn’t sure if it’s a date but then remembered we both like each other so it’s basically one. I don't know why I’m so nervous randomly because I got the 2 hardest things out the way. But one thing I can think of is other than text we have no other background knowledge of each other.
How to get rid of nervousness before a date?
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