agreed knownothing. I use a cheap Amazon coaches wrist band with plastic cards and a wax pencil and it works great for me.
I bought one of those, but haven't actually used it yet. Been putting painter's tape on my wrist instead.
OP: I'm new at this too, so take this as a n00b's 1st year discoveries
You really don't *need* anything other than a rifle, ammo, eye and ear pro, and a good attitude. Your squadmates are likely to let you borrow their stuff. Can't promise anything, but I've been offered bags, etc during matches when I didn't have em The rule of 3 applies here just like tools: if you need to borrow something 3x, you need it, go buy it.
At some point, you'll probably want a big, square 'take up space in your position' bag. Helps keep you stable. Try a few first before you buy
You don't really need a rangefinder to start off. IME MDs are usually pretty good at estimating their target placements.
I WOULD recommend a bigger scope. Venom 5-25 x 56s are what are on my rifles. I rarely shoot over 14-16x, but with the bigger scope, you have a much larger field of view. Less 'where'd the target go?!'' wasted time. AMHIK I started out shooting MARS matches with a 4-12 BDC scope and got lucky making hits over 100yds I figured out why most of the guys shoot 'Christmas tree' reticles quickly
IME PRS is more about 'building stable positions' than it is 'ultimate accuracy.' Watch what the other guys are doing (the ones making hits!) and do what they do. There are tricks that aren't immediately obvious to a n00b like 'brace the rifle against the side of the barrier if you can' that'll help with stability and accuracy. There are videos on YT that show some of this...
More IME: if you can't spot your misses, you can't make meaningful corrections..
Even more IME: if you're on the wrong targets, your hits don't count. If your scope is set to one distance and you're shooting the right target at a different distance you won't make hits either unless you miss 'just wrong' and get lucky
There's more, but I'll stop there
M