Once you've created an account with Theia you will need to complete 9 simple onboarding steps. These steps can be viewed at any time from the "Onboarding" section of the Theia menu. Additionally, steps 1-6 can be completed before your sensors arrive, setting you up to get started with your sensor as soon as you receive it.
The video below walks through navigating each of these steps:
You can learn more about these onboarding steps here.