How do I finish a log that I plan on using for an inside end table?

I recently obtained a great piece of oak that I want to use for a side table in our living room. I believe it is a piece of red oak log that is about 2 feet in diameter and roughly 3 ft tall. I need to figure out how to dry it out, get any insects out of it and ultimately varnish it. Can anyone provide me some direction? I have never done this before. I don't know how to dry it out, kill any insects or what to use to varnish and seal it. I have some deck stain. Will this work? I also wanted to get any thoughts on whether I should take the bark off or leave it on.