So I saw a tutoring remote job for $60/hr, good pay, so I went through the interview process and they said 'welcome to the team'. They mentioned doing a background check and reference checks which they haven't done yet. They sent me an email asking me to do a lot of work, describe how I would lesson plan when speaking to parents, how I would advertise, etc. I assume this work is unpaid? I'm not even sure that I'll pass the background and reference check. Should I tell them I'm not working until I get an official offer?