Zero your rifle to ensure it’s good to go - then practice off of sticks 40, 70 100 and 150 regularly
95% of my shooting is off of sticks, I like to keep my eye in by constantly checking we are all good to go
When you come to shooting a hundred or less it makes it considerably easier if you practice further than you want to shoot it’s makes it easier
Find the factory Ammo that suits your rifle and you shoot well with and stick with it using a .243 find a 100 grain SP round and practice all the different range disciplines, there are a stack of factory Ammo available I use Hornady 100 grn SP in my 243 and it’s subs less than half inch with me on the butt, that gives me a tight zero to work with from the start
Keep it simple, don’t over engineer the shot,
Only thing I would say is to practice shots in inclement weather as well to get it in your system, keep calm, breath out and
Put it in the spot, the more you practice the easier it will become
Good luck