I can help you with this. It's a fairly simple process and I'll break it down for you. You'll need a small flat screwdriver and a Phillip's screwdriver.
If you're just replacing the bulb, look around the edge of the lens and you should see 2 very small slots (on the opposite side from the switch) where you can insert the flat tip screwdriver and gently pry the cover off. You may have to pry in both holes to get it to come loose. The bulb then just pops out from between the spring contacts and the new one pops right in.
If you're removing the entire assembly, with the lens removed you'll see 2 Phillip's head screws inside that attach it to the roof panel. The assembly just pops into the headliner and may require a little prying to get it to come down, then disconnect the connector and it's out!
If you have any more questions on this subject, just reply to this post.
If the information I've given you is helpful, I would appreciate you clicking on the ACCEPT button and feedback is always welcome!