Do I need an account to book with someone?

You don't need an account to make a booking with someone who uses 

All you need is the booking page link or URL - it will look something like Sometimes you'll find their booking page embedded directly in their website.

If you can't find the link, just contact the person you're looking to schedule with, and they'll be able to provide it.

If you've already scheduled an appointment, they will send you a confirmation with details on how you'll join the meeting. If they haven't included that in your confirmation email, contact them directly and they'll be happy to provide further details.