Hi there,
Sounds like you need to create a user form with a multiline textbox control to contain the Ts & Cs.
Go to your VBE environment (Alt+F11) and right click in the Project Explorer to insert a new UserForm. Use the Toolbox to add shapes for interacting with on your form (controls). If you don't learn enough by reading on how to work with UserForms let me know and I will send you a code stub. If you design the userform, please just let me know the names you give to your controls (objects built on the form) and I will send you code.
Good luck! This is how your knowledge will grow and it's fun.