I normally take a brass brush, dab a good amount of JB Non-Embedding Bore Paste on it, run it thru the bore about twenty times up and back. If I can't get to the breech, I don't get sweaty about it, I run it thru the muzzle...using due caution and care of course. There will be those who will poo poo this, but all my life I've been running rods thru the muzzles of steel barreled firearms with no problems, I don't see where a steel barreled air rifle is any different. Then I'll run patches thru the barrel soaked with Hoppe's #9...same philosophy, doesn't hurt steel barreled firearms, shouldn't hurt a steel barreled air arm...until I'm satisfied. Dry patches after that until they come out more or less clean. I'll wipe down the entire rifle with Ballistol, oil the moving parts I can get to with whatever lubricant suits me at the time...NEVER WD40 though...I'll torque the scope and stock screws. Then I'll have at.
OP, what you'll end up doing is taking all the information that's out there, sifting thru it, using what makes sense and what doesn't. My method is NOT the end all to beat all, it's just what works for me! If you are uncomfortable with cleaning from the muzzle, don't do it! Use another method! If what you've read gives you concern about using Hoppe's #9, don't! I personally don't use any old cleaning rod that's out there, I've invested in Dewey coated rods. Only about thirty bux or less per caliber, they are cheap enough.
My personal opinion is to shoot your new rifle for a while before you starting thinking about hot rodding it or tuning it. It might not need it, given what you want to do with it. For me, shooting an air rifle in my back yard is simply a release, a way to reduce tension and stress. Nothing more. My rifles don't need to shoot 15 FPS faster than stock, although I do chase the elusive ten rounds in a .22 caliber hole!