You can buy a gun cleaning kit that has everything you will ever
need in it. They come complete in a 6" X 12" or so box with cleaning rod, bore brush, patch holder, jag, a box of patches, a small bottle of oil, and a small bottle of solvent.
Solvent is for cleaning. It dissolves grease, oil, powder fouling, metal fouling, hand/skin oils, and lifts (floats) salts. You disassemble, scrub, wipe off solvent, then oil to prevent rust.
Bore brushes are for cleaning the bore. You put solvent on them, and push them through the bore repatedly to scrub any fouling loose.
Patches are for wiping and swabbing the bore. After scrubbing the bore, you soak a patch with solvent, then run it through the bore on the cleaning rod using the patch holder loop, then run several dry patches through the bore to dry it. An oiled patch to lightly coat the bore with oil is recommended.
Wipe down the exterior of the gun with a patch or small brush soaked with solvent. Wipe with a dry patch. Wipe with an oily patch or a larger rag to leave a light coat of oil behind. This helps prevent rust.
That is all you really
need, but as you can tell, many people do other stuff because they want to or have learned that it helps. Except for WD40, I do a lot of the same things. It will not take up a lot of space nor fill up shelves with "stuff".
And then there are the people who turn cleaning into a ritual . . .
Rubbing alcohol is 50% propanol and 50% water. I try to avoid putting anything onto metal that is 50% water.