Take the PC of your choice and see how far you can get in the Universe of 40k before you die! But don't worry, its not all bleak! You can make the Galaxy a better place by killing your foes, leveling up your PCs ability to do paperwork until they make Gulliman look like a chump or even becoming so skilled in being a Fleet Admiral that Abbadon fears coming out of the eye of terror!
Survive the lower levels and see if you snowball! Good luck. Keep in mind though, that you are guiding...