I clean mine when neccesarry - what I mean by that is that having match chambers, sometimes it fdeels like the shell is feeding "tight" thats when I clean it, my 54 MRS factory I clean after about 3000 - 5000 rds, but I always clean my bores before competition, - reson for that that I practice with different ammo then I shoot at matches, and i usually will go through 100 -150 rds before match so the barrel will get well lubbed,(to explain many believe that when you switch ammo you will need 10 - 20 shots to lube the barrel - with the "new ammo lube")
SOME ! shooters do not clean their rifles ever - and one of these dirty guys is Imas - who by the way is one of the top shooters in this sport.
I clean mine with shooters choice, but I heard that the most "corrosion friendly" is Buthers bore cleaner and I bought a big botle but have not tried it yet (still have lots of S-choice), I use nylon coated roads made by DEWEY, and a bore saver - bore guide is a 95% must as it will guide your rod nicely.
as to the scope - I use B&L 4200 and I love them - no problem with tracking and I do not have to TAP knops like the Leopolds guys do, just crank it to the next setting and it is all.
by the way ... new guy......... you worry too much about your setup, you have more than enough to get started with, do not have toooooooo high expectations, because your worry will make you shake like a leaf in the 50 mph wind and you will not be able to hit the back stop - --- not talking about the targets.
Have fun and enjoy, you need to waste at least a year to get "tuned in"
so do not expect tooo much from your first matches, I would hate to see you leave just because you got dissapointes on your "expected" performance, it is tough sport - and HEY....... when it gets tought ---- the tough gets going