To sign up for a 30 day free trial, first go to the ContractorTools website and click on one of the "Sign Up For ..." buttons. This will display the sign up form:

Enter your email address and a password, and your first and last name. Then click the "Sign Up For ..." button. This will prompt you for your company name and Zip (Postal) Code:

Click "Add Company" to proceed. This will take you to your ContractorTools account management menu:

Here you can view your current account information, enter or update your billing (credit card) information, and select or update your subscription information.

Now, to install ContractorTools, please see the help article: How Do I Install ContractorTools?