It takes about a minute:
Go to app.tryinhouse.com.
Sign up with your email (or a connected sign-in option).
Start exploring sample spaces right away — add your address when you're ready to twin your own space.
You must be 18 or older and in the United States. Creating an account is free; the $49 fee only applies when you twin your own home. Trouble logging in later? See "How do I reset my password?"