CDK Terraform is like AWS-CDK an node app.
So once you have to install the commandline:
npm install --global cdktf-cli@latest
For each project, you create a project template inside an empty directory:
mkdir learn-cdktf-go
cd learn-cdktf-go
cdktf init --template="go" --local
In the cdktf.json you have to define the terraformProvoiders.
Add the line
    "terraformProviders": [  "hashicorp/aws@~> 3.67.0" ],
The whole config should look like this now:
{
    "language": "go",
    "app": "go run main.go",
    "codeMakerOutput": "generated",
    "projectId": "c99f0e38-5feb-41a1-bfd0-2d00e6273780",
    "terraformProviders": [  "hashicorp/aws@~> 3.67.0" ],
    "terraformModules": [],
    "context": {
        "excludeStackIdFromLogicalIds": "true",
"allowSepCharsInLogicalIds": "true"
    }
}
The version number of the terraform provider and the project ID will vary.
Now apply
cdktf get
This will take a few minutes. In the subdirectory generated all AWS constructs are created:
Notice:
Generated go constructs in the output directory: generated
The generated code depends on jsii-runtime-go. If you haven't yet installed it, you can run go mod tidy to automatically install it.

Now you can proceed to create resources in the next chapter.