If you already have an account with interests.me (ie you have already created a password), and you want to add an organisation, sign in to interests.me using our homepage - https://interests.me. If you don't already have an organisation we'll take you straight to adding one.
If you are already associated with an organisation (as a team member or an owner), and want to add another one, go to the top left corner after signing in, where your existing organisation's name appears. Click on it, and there will be a dropdown option to add a new organisation.
The new organisation that you add will be managed completely separately from any existing organisations, and nothing will be shared between the two organisations, but you will be able to move between them seamlessly by clicking on the organisation name at the top left.