I was an older candidate when I went through in 2020. I'm a big guy (200+lbs) who likes to run 5ks and 10ks for fun so the run was a no brainer. My biggest piece of advice is that you train up to HIIT intervals of 30 min (super sets, no breaks) @ 5-6 days a week. The "smoke sessions", "pushes" , etc would've been a lot easier on my body had I trained more for HIIT. There were a lot of folks who rolled because of HIIT related injuries.
Don't think you'll duck out, or stay hidden. Your going to leave your sweat and blood on the field I promise. I had a big mouth, loved attention, and definitely chose strong over smart. Lastly, find your center. My absolute favorite times were the 0530 3-5 mile group runs. Great time to clear my head and embrace the day.
Edit 1: I forgot to attach the updated PRT standards from our CFL. Attached is the Feb2022 edition of Guide 5. Thanks.