Hi, thanks for your question! So whenever you create a tutor, whether importing many at once or creating an individual user, they will receive a welcome email. You can see this and customise this automated emails by going into your Communications > Email Definitions.
Feel free here to add a line or two about your tutors filling out their profiles to encourage them to do what you need them to do!
Once they have logged in, they will be able to start applying for available jobs or begin to add lessons to jobs they have been attached to. Feel free to direct them to the help section dedicated to tutors.