I just purchased the Samsung Galaxy Tab 2 10.1" 16GB Tablet. I've never used an Android device, or a smart phone. I bought this as a lighter-weight alternative to getting a laptop or notebook computer for traveling.
I have been using a Sony Reader PRS-505 for several years, and love it; however, last night I dropped it at the mall and now the screen is broken

. I was in the middle of a good book, and need help to get back to reading, fast.
I normally use Calibre to organize my books in my home computer, and upload them to a SD card to use in my Sony. Since my new tablet has a micro SD slot, I hope to do the same with my new tablet.
1. What do you recommend I use as a reader app for my Samsung?
2. What e-book format(s) are the best for Android apps? Most of my books are in .lrf, .epub, .lit, .pdf, .rtf, and .txt formats.
3. Someone told me there is a Calibre app for Android. Can that be used as a reader app? I LOVE my Calibre program for my computer.
4. There is a Kindle icon pre-loaded on my tablet. Would that be a reader app? If so, what formats are supported?
5. Am I forgetting any important questions I will need answers to?
If there is a specific thread/topic for my device, please re-direct me.
As an aside, are there any general tutorial sites, to help a novice get familiar with her new Android tablet? As always, I am grateful for your help and advice.