When I click Try SketchUp, it asks me what I use it for, then it has a button to login and a link to “create new account”. But both take me to a login page where there’s no option to create a new account.
Can you share a screen shot of what you do see?
The way it works is not entirely obvious. To make a new account you enter the email address you want to use on the account, then you go on to the next step. The system will notice that you’ve used an email address that isn’t currently a Trimble ID, and you will see extra fields to fill in, to then create the new account.