Wow! Thanks so much for all the information

My mind is a bit boggled
I'm not opposed to learning how to strip DRM (what IS that?! lol) to get the books onto the kindle. I just wonder if it's too difficult for a rookie
I guess I do 'have' a US address. My stepmom has a place in AZ, so I could use that as an addy.......if I was looking at the Nook........would I need a US credit card? Or could they tell that my IP address was Canadian and then not send the book? (I thought I read that somewhere

).
How would I know if the library has mobi files? I have emailed the library to see what information that they can share about using this system but so far haven't heard back. My library is great for books, and if I see something I want to read and ask them to bring it in they do (have never been turned down)! But I don't know if this will extend to e books too.
Does stripping the DRM and converting a book take a long time? Is it a few minutes kind of process or a few hours or a day?? Is is like a 'program' you run on the file? (sorry if these are questions don't make sense - I have no clue about these things

)
I think I want the kindle, but worried that I'll be buying a ton more books than before instead of borrowing

therefore feel like I should get one that is better supported by the library. sigh.
thanks if anyone can answer these few more questions! I really appreciate it! I'm glad to know that library books could be read (i need to research why this is a 'sketchy' practice though) if I strip and convert