Hello there! My friends gifted me an Ender 3 printer, and I achieved my first successful print today! I have a few (probably stupid) questions:

1. I will store it in my garage, in a shelve among other things. It is quite dusty, so I'm thinking of building a plexiglass hermetic box to keep it while powered off. Would it be a problem to keep it closed also while printing? This would change the type of box I'll build, because there is not much space and I'm trying to save the most of it
2. How do I store the filament? I (currently) have only one filament (black PLA), so I see no need to remove it from the printer each time, but leaving it "connected" (I don't know how to say it) will not allow me to store it in a different way the printer is stored. Do I need to store it in special ways or can I leave it connected? (And bonus question, what is the correct word to say it?)
3. If I don't move the printer, how often should I calibrate it?

Sorry if these are basic questions, I'm taking my first steps into this magic world... Thanks in advance!