Got a stupid job interview later today. What style of clown makeup should I wear?

Last week I saw an odd thing on Indeed where I was apparently "already qualified for an interview" for a job posting at a local hospital that I've been trying to get in to for years for IT. I didn't have to apply but just set up an interview time. Well turns out it's actually a "hiring event" which I was informed after a recruiter called and was like "Are you sure you wanted to apply for this? You aren't even A+ certified anymore." You know because you forget how computers work if you let your cert expire even though you've been working with computers for the last 20+ goddamn years and at an IT level for the last 6 but sure.

She asked me if I was willing to re-cert and I said yes but whatever. My Google IT cert which is the same thing isn't worth shit I guess so that's a scam. Thanks Googs...

In any case, if you had half a day to crash study for a stupid fucking IT interview that was the equivalent of a 10 min speed date, what would you brush up on?

I ask because like you literally just google what you don't know. Everyone in the industry knows this, but you can't fucking say that at an interview. Just like when they say "can you tell me about you employment gaps?" you can't say "well you see I was fired from jobs because I am autistic." I already and prepped to lie and say I've been doing freelance IT and web dev in my spare time and that also covers those gaps.

Edit: done with interview. They closed the position on Monday because a guy that quit asked for his job back. I'm going to go kill myself now.