Editing submissions? Not at all--if you check out the submission sub-forum, folks will put up their documents for community review. I know Knife-Wielding Crab has a Nash expac he's got open for review, for example. Karakara has a few up for sure, and Oreo Luma's Clementine might also be up for edits while it awaits review? Worth checking with them.
If you mean editing the game, submit typos as bug reports for a while! I also have been working on the wiki, so I had demonstrated ability to catch errors / being detail-oriented.
For writing, there's a whole guide to writing for the game in the Submissions sub-forum! There are new rules for first submissions--be sure you look at those before you get started.
LMK if I didn't answer your q!