Welcome to the fray cdf294. The Windows version is out in front in terms of functions. Fundamentally it's easier asking questions when you are trying to achieve something with your library or set up as compared to reading documentation (Wiki). The thing to remember is that the library and tags (metadata) are separate to the actual media files and how they are organised. Try to set up a common method of orgnising your stuff upfront and then tweak as you go. Far easier that reorganising your files later when you have 10,000's.
For example I import all my media, picture, music , movies sits under the one tree. The same tree accessed originally by iTunes, now Windows MC and recently I have also got Linux MC library up and running also. Each have their own library entry but there is only one media file. Although I have ditched iTunes because it can't do FLAC loseless and I have wound the $ down to near zero. I import all new stuff into a @Import folder first, auto-import is configured to run in the background to pickit up. MC will autmatically load your CD and rip it to the files you want if set up correctly. There I check and fix tag entries where needed by looking at the library sorted by import date. With MC accessing internet files most tags, cover art are found automatically. Then use F6 rules to move and rename the actual media files simultaneously into a consistent scheme (using Presets in F6 Rename, Move, Copy). I'm slowly moving and replacing older library CD rips to loseless FLAC. MC can also be used to convert audio format I use to convert FLAC (album) to FLAC tracks (converting lossy formats is not a good idea). Once your library files are well on it's way, and you have a 'workflow', you can start learning about other functions like skins, cloudplay, network DLNA, theatre view etc etc. Plenty of folks around to help - just ask.