Terraform certification or the Terraform Associate certification exam costs you USD 70 plus locally applicable taxes and other additional fees. Serious about entering the Cloud arena? Check out the Cloud Computing courses, from Intellipaat, that will help you get trained and certified, in the domain, with the help of industry-grade course, along with guided projects, to help you get started.
Look at the following video on Automate your AWS Cloud Infrastructure to get started on Terraform right away.