You've come to the right place, @batvalil.
I'd be glad to help walk you through provisioning a time tracking user access to your tutors and consultants.
Once your tutor or consultant is able to accept the user invitation and create their own login, they'll be routed to the page where they'll be able to enter the number of hours they've worked for the week.
Currently, the ability to limit your time tracking user's view when selecting the customer or project assigned to them is not yet available.
Should you have other questions about giving user access in your QuickBooks Online account, feel free to get back to us here in the Community. I'm always here to answer your inquiries.