It’s really simple.
Just connect to your Karma Go and a popup will appear asking you to create your account. Simply enter your email address and a password of your choice (make it strong).
If the popup doesn’t appear for some reason, head over to your browser and enter: http://hotspot.yourkarma.com into the address bar. You should then get the prompt to create your account from there.
There’s also plenty of good info to help you out on our start page.