VoMD

Hi guys, I'm new here and this is my first project (I'm learning as I go and have no background on mechanic or anything like that), so i probably going to have lot of questions. My first question is I got a 280z, and after I remove the value cover, I saw the engine as attached in the picture, and the inside of the value cover was dirty as well. I was wondering what's the best solution to clean it myself instead of sending it to someone else to do it (I'm trying to do everything by myself as much as possible).