I feel pretty well suited to answer this. I'm a 3-gunner, and can shoot 1-Moa fairly consistently out to 300m when I take my time, and would love to get into PRS. The big things I want to know are:
1. The minimum equipment requirements. What things do I NEED before I go to my first match. I feel like there can be alot of equipment involved which can be intimidating, especially to someone on a budget. Also for people buying gear, are there specific rifle/scope characteristics to value over others? (Ie length, weight, focal planes, reticles, etc.)
2. Skills to be practiced before hand. Jumping straight into a match with no background would be a steep learning curve. Are there any specific skills to be practiced or drills to run that would make the first match go smoother? For example in 3 gun we practice alot of reloads and transitions between guns because those are common failure points.
For centerfire and event that is moderate in distance, you might be able to run your AR in tactical division. Then you just need to add a higher mag variable scope (10 to 16X works for most targets). Load with a 75gr or 77gr bullet and go give it a try.
If you prefer a bolt rifle, sub MOA, ability to use AICS mags or at least hold 10 rds or more, comfy to you in the various positions you will be in. Has to be reliable in cycling with a consistent trigger pull. It does not need to cost a bunch but it has to cost enough... some events offer loaners. Might be way to try without huge buy in????
Bipod - Harris serves many well.
Rear bag - I use my gamechanger when not supporting the front. Game changer or similar multi surface/function bag will be a huge aid. Learn how to use it on various shapes and angles.
bigger pump pillow - nice to have to make awkward positions more stable but you can live without.
Knee pads and elbow pads - be prepared to move and set up on various surfaces. I hate bleeding....
For practise, I like to do a bunch of unsupported practise - standing, kneeling, sitting, prone. I do this with a rimfire so I can get alot of trigger time with little cost.
Barricade practise - there are about 6 families of props you will face so if you practise the basics, you are just applying variations of that to the prop. Lots of videos on drills and better body positions.
Wind reading - great books out there (my fave is the Miller Cunningham one)... learn your dope by shooting as far and as often as possible. Ballistics programs are a great start but you should verify in the real world cause....
You are learning new coordinations and that needs time on the range... or dry firing. There are many many videos that show all sorts of stages and walk you through the course of fire... then you get to see shooters run the stage both good and bad. Then you try and set up the stage and practise the skills adjusting for what works best for you.
Good luck.
Jerry