I use Wikipedia on a highly regular basis and occasionally edit for minor errors, typically spending way too long relearning how to do rather simple things (like citations!).
I am American, fluent in English, with a passable ability to read Portuguese and Spanish. I work part time as a copy editor for a newsmagazine, so my edits typically follow AP style.
Feel free to message me with any input about my edits and the next time I log in to this account (probably 6 months after the previous log in) I'll see the advice.