The first and immediat job that several of my guests find is just teaching English, because I have an agreement with some institutes who offer classes (grammar and/or conversation) to executives of companies wich prefer native
english speaking teachers.
No need of tax # or other papers (They pay as they are paying to me for your accommodation...)
Payment is about $30/hour, and you can easily begin with 4/6 hours a week, increasing them with some more time here.
Some knowledge to teach English as a foreign language it's enough. If you have the TESOL, TEFL, ESL or similar certificate, much better.