ask them to buddy you up ,for your 1st match,with a mentor. Yu'd be amazed at the gun handling mistakes I see new shooter make,
As to some suggestions ;
buy the lightest shot gun ammo u can find,which is usually the 1145 fps stuff,and in a Stoeger coach,it will get your attention but not beat u up like the 1200 fps+ stuff will.If you can find the Winchester Featherlites in ur area, even better.
when you pull the trigger,don't listen for the clang before moving on , it's hit or a miss,just keep moving along. One of my mistakes,early on.
I like your choice of bullet weight, are they rnfp? most carbines don't like swc's. I use 5.6 grains Tb,altho I sometimes use 6 grains in the '66 for a better gas seal.
We were all new once, if you don't understand the stage, don't be afraid to say so. some of the sweeps are tricky.
take a breath,and have fun !