Good advice right here.
Regarding your age: well, I'm 70, ate up with osteoarthritis (especially cervical and lumbar spine), and have a ROM-limiting injury to right leg. So, I'm slower than cold molasses in PRS competition (usually 90-100 second par times). NRL22's usual 120-second par times are much more accommodating for us old guys - but, in the early going, you will still find it challenging to build positions in that time window.
Trust me, though - it gets easier as you move and loosen up stiff joints/tendons/ligaments, and your overall fitness improves. Enjoy the journey. Positional practice is paramount! With NRL22, you can download the COF (course of fire) for each month and practice building positions beforehand in air-conditioned comfort :-] . Props are usually built around things like buckets, ladders, chairs, etc. which you'll have around the house. For me, the hardest props by far are the low ones (2- and 5-gallon buckets for example)... again, practice helps.
As for the rifle choice: I've worked with everything from the Ruger Precision Rimfire Rifle on the low end through CZ 45x models in the midrange to Vudoo and RimX at the high end. From a budget perspective, the sweet spot imo is one of the CZ457 variants, especially the MTR, or maybe a Tikka T1X for a bit less (but the Tikka requires more add-on bits for competition).
Optic: I would be looking for a FFP optic in the $600-800 range, more if your budget supports it. I suggest calling (on the phone) at least one of the Sniper's Hide supporting vendors for guidance; tell them you found them on SH. I've purchased scopes from Doug (
@gr8fuldoug) at CameralandNY, Richard at
@CSTactical, and Scott at
@LibertyOptics. All are great, all make our community better.
And yes, my recommendations blow well past the $1200 base level. I put together one base-class-level rifle for my nephew five years ago; it was a Ruger Precision Rimfire Rifle bought locally mounted with an Athlon Argos scope from CameralandNY - the whole rig came in at under $850 shipped. Its performance was commensurate with price level. It would have been fine for an entry-level NRL22 rifle, but a serious shooter would outgrow it quickly.
Good luck.