Hello!

I am very new to woodworking, and really need a some advice!  I recently acquired a large maple stump, appx 3′ diameter x 18″ high. The tree was felled over the summer, and it has been outside since. 

I would to make this into a coffee table by preserving and sealing the wood, and placing it on casters.
 

Here are my questions:

1. How long do I let the wood dry out in my garage?
2. What is the best way to preserve the wood so it doesn’t crack?
3. What should I use to seal the bark? (The bark is in really good condition and there is no separation from the tree at this point.)
4. What can I use to seal the exposed wood? I’ve seen resin used, and an oil/poly mix and some other things. I’m not sure what is best.

Thank you in advance for any advice/help you can offer!