I would suggest reading
http://androidforums.com/droid-all-...t-guide-updated-march-15-2011-9-58pm-cst.html for starters. So much information in that thread, it will explain to you what you can expect to see from rooting your phone.
It helps if you have some knowledge of linux, but it is not necessary to be a linux geek to root your phone. The linux geeks have made it pretty easy for the non-geeks to be able to do it, as long as they can read and
follow directions. Following directions is key- there are no shortcuts. If there were shortcuts, the geeks would have already incorporated them