Haven’t had an interview in 20 years. Now have one tomorrow

I found out last week I was losing my job of 15 years in 60 days. I made a resume that got great feedback from recruiters my friends know so I posted it on my LinkedIn page I just made and last weekend I applied for 5 jobs. I got an email last night for a teams interview on a dream job for TOMORROW with the CEO of the company I spent all day chat gpt’ing common interview questions with my background and the job description I tried doing some mock questions but omg I’m terrible. I’ve never done this and don’t have answers to common questions. Going to make a complete fool of myself I think. I’ve tried for hours now to talk in intelligent sentences. What I do is pretty senior but I work for a small family company in an area where people aren’t super “professionals” This whole thing is freaking me out. I hate to make a fool of myself. Do I think I can do the job, yes. Do I think I can present myself with no interview experience, no Ugh!!!