Can you elaborate more on what steps have you taken and which page are you stuck on? We would like to provide the best user experience, so we will appreciate the extra information.
The Telerik Platform free trial is available automatically when you register and enter the Platform. Therefore, if you have signed-up on www.telerik.com, then you should just log in and click on "Telerik Platform" in the upper right corner of the screen. Your Platform trial will be started automatically.
I am looking forward to your reply.