I would recommend that you read, read, read. Diving into the upgrade process can seem daunting, but research is part of the journey. I have found myself enjoying the learning that goes along the entire process.
Here's a good start for a load of information on .99:
just research as much as possible. i upgraded and tried all of the betas, didn't like any of them. pretty buggy for me so i am back down to .75 until an approved upgrade.