I'm going to give a different perspective.
Everyone is always like... no pressure, we love the newbs, just be there to learn, have fun, talk to anyone you want, yada yada yada. And that's all true (to an extent). But it's not like all the seasoned people are there to serve you. They aren't there FOR you; they're there to compete and be focused on competition. It's not a Pro-Am event (unless its GAP Grind at K&M which is the greatest PRS match on earth IMHO).
Fact is, all but one PRS match I've been to has been extremely fast-paced and overtly overwhelming for a newb. You have usually 90 seconds to shoot 10 rounds at sometimes 6 different targets at ranges you've never shot even sitting comfortably at a bench. Even if you have or borrow some glass, find the targets on the glass, get your bearings... you still won't find them well through the scope especially after the shot before you transition to the next target (unless they're close together, and they often aren't). You have to learn the landmarks and reference points and learn how to find them through a scope while teetering a rifle on a cattle gate which you've never done before. That's the challenge, but it's... a lot for your first, second, and third PRS match. It just is. Some guys - especially ex-military - get it fast. Maybe you will... that's great! But it's a lot.
Anyway, I have gotten used to the pace mostly, and so will you, but it can and likely will be overwhelming your first time. Don't let it shake you. I make it a point now to find first timers at any PRS match I go to (knowing full well I'm still a newb and struggling myself to be accurate) and make sure they know where to go, what to do, how to squad, etc. Matches I go to at one particular location are run kind of... sink or swim... and I don't think that results in repeat PRS-ers. In fact I knew three guys who I was talking to at one match who vowed never to come back after going to a PRS match at that location because they felt being they were ignored and lost. At other locations, it's a much better-run event where newbs are acknowledged beyond some obligitory mention during the safety briefing as if it's a surprise they're there in the first place (god that pisses me off when that happens). They are welcomed. They are called out and intentionally paired with someone who can show them the ropes and/or spread out into groups so they don't all end up in the "left overs squad" full of newbs that can't help each other get better and feel comfortable. I would see to it that happens for you at your first match. It'll make you love the game that much more. Find someone who knows what they're doing... be humble, and ask for their help learning the ropes. You'll find you'll get that help. But if you don't ask... it's most often the case you don't get it.
Just know, as a newb, you'll be busy. You'll be busy watching others, trying to remember and relate to the stage descriptions which are often written by someone who didn't quite excel at descriptive writing in school (been many times even the RO was like... "um, forget that just shoot left to right because that makes no sense" or something). You'll be digging into your chosen ballistic tool (app, Kestrel, etc.) to get your dopes for the next stage while trying to integrate what you learned about the wind and actual POI in prior stages. You'll feel obligated to make yourself useful by being a backup glass guy or running the click counter or whatever (and you'll learn a lot from that so do it... sparingly and after you're fully ready for your next stage). You'll forget to go to the bathroom and eat. You'll forget to drink water (don't). You're head might be throbbing because you've been surrounded by rifles with muzzle breaks blowing concussive charges at you all day. It's fun as hell, PRS, but it's not a book club.
But you're going to get your first hit at 600. And at 800. And maybe at 1,000 if the wind doesn't bite you. And you'll feel the bite of the long range shooting bug. And so long as you've met some guys and gals and remembered their names enough to be able to in the parking lot after the rankings are announced something like "see you next time John, nice shooting today, appreciate your help... oh and way to recover on Stage 4"... you did it right. You really got to know someone. That'll make the next PRS match where John or whoever likely will be at a ton better.
I learned all this late. It clicked for me at my most recent match which was what I needed - slower paced, longer shoot times, slightly closer targets. I got to allow my introvert brain a minute to relax and talk to people about more than just... their rifle. Also, what I learned is to be comfortable being terrible. To ask - not expect someone to tell me - how I should approach XYZ stage. I've learned to ask the glass guy - if we are doing calls - to do calls in a certain way so I can understand them better. I've learned to introduce myself to three people in the parking lot and ask about their gun so I can get to know someone and maybe end up squading with someone interesting or using the same cartridge, etc.
Hopefully the above helps. IF someone told me the above before my first PRS match, I would have had a better time I think.
