I did valve cover gaskets a few months ago with spark plugs for fun at 90k. There's a couple good guides on here, and check realoem for the part number or just call ecs. My buddy and I did it in about 5 hours, and I'm not going to lie it was scary at first but looking back it was really no big deal. Plus my buddy just drank my beer the whole time and didn't do much. Just take it slow, make sure you take the time to get everything out of the way, have your external torx sockets handy and go fo it.
Only issue I had was I dripped a little oil on the exhaust manifold, so there was some smoke when I fired it up but I sat there with a fire extinguisher for 5 minutes until it burned off, so get a rag on the manifold before you start.