Has anybody had a root canal?

I just learnt a sore tooth of mine is caused by my tooth root never fully closing (due to getting braces and shifting my teeth around). Now at 30 I need a root canal.

I’ve never even had a cavity before. I’m legit terrified. Teeth are the one thing that are much worse than nails on chalkboard for me.

How was your experience been? Any words of advice or words of encouragement? I could use it :(