In need of guides to maintain the bike that I'm about to get I'm about to get myself a cheap hybrid (costing ~200 USD) and I'd like to be able to learn how to maintain it on my own without having to go to a bike shop every now and then (and also because I'm a student who can't really afford to do that). If there are any books that could be suggested, that'd be really helpful!
It'd have alloy (6061) frame and rims (double walled). Shimano tourney groupset (3×7), adjustable handlebar stem, quick release seat post as well as both wheels.
Link-only answers are frowned upon here but I'm going to provide one anyway
https://www.parktool.com/blog/repair-help
Park Tool Company's Repair Help web site is the most comprehensive, professional and understandable set of articles and videos on bike repair and maintenance that is out there.
If you run into specific problems, Bicycles Stack Exchange is of course a great resource.