For example, is there a way to know how close to the editor badge you are?
The short answer is no, as far as I can tell after searching MSO.
The medium answer is to check out these posts on meta that don't really answer your question:
- What kind of edits contribute to the editor badges?
- What are the requirements for the Copy Editor badge?
The long answer is also no.
For sites in the Stack Exchange network that have graduated, there is SEDE (the Stack Exchange Data Explorer). That lets users create queries that can be run against the data and this one will get approximate progress on the editor badge for the StackOverflow.com site given a user ID number. But RPG.se is not included in that data yet.
If RPG.se is included in the big (monthly?) data dump, you could download that and try to query it yourself... :)