I dunno any guides out there. =/ But can I write my personal opinion as a guide? :D?
There are more qualified people and everything than me but personally i'd just say as a 'guide', don't bother editing the questions and answers with a couple spelling mistakes or grammar errors. You'll probably be doing it to every second post then. Edit the ones which are barely readable or have broken links. Also convert the answers which are blatantly obvious to not answer the question, and if in doubt, pull out. :P
Gratz on Expert. o3o
Use your editing powers as a tool to fix bad questions; not to troll KOD
Trolling KoD is funner with silent edits