So, my basic maintenance for riding outside is to keep an old t-shirt near my bike stand. When I get back, I slap some lube on the chain and use the shirt to wipe it off. The other focus area is the pulley wheels. I spin the crank while touching the t-shirt to one or both sides of the pulley wheels by the rear derailleur. You would be shocked to see how much gunk accumulates there. Other than that, I do a quick wipe down of anything else that may have gotten nasty from the ride, sweat, or hydration spills. If it’s bad enough, I hose the bike down. I have to do it more on my tri bike due to liquids bouncing out of my aero hydration system (not because I pee on the bike).
Indoors, I do a quick wipe down of the bike after each ride and then do the drivetrain thing that I mentioned above once every week or so.