Terraform folder structure

I am new to terraform, moving from cloudformation and need a help in folder structure. I am creating bunch of aws services and have the folders structured as below. Is this the right way?

Development
     |
     services
         |
        lambda_function
          |
          main.tf
          vars.tf
          output.tf
        ecs
          |
          main.tf
          vars.tf
          output.tf

Question is, if we import existing VPC information, should it be in each layers? like a separate tf? or part of main.tf. There are many services who having the folder structure will help rather 3000 lines of single main.tf. Thanks

Solution

Like Filip Dupanović said, read the best practice guide on Hashicorp's site, but for folder structure, the gist of them are:

put your resources in a main.tf file
put inputs in variables.tf
put outputs in outputs.tf
put any private sub-modules you make (private means they are not intended for use in other modules) in a modules sub-folder.
create an examples folder that contains examples in subfolders.
create a README that describes the module's use. Consider using terraform-docs to generate part of it.

Example for mymodule in the git repo terraform-aws-mymodule:

terraform-aws-mymodule
 +- examples
 |   +- simple
 |      + main.tf
 +- modules
 |   +- lambda_function
 |       + main.tf
 |       + variables.tf
 |       + outputs.tf
 |   +- ecs
 |       + main.tf
 |       + variables.tf
 |       + outputs.tf
 + main.tf
 + variables.tf
 + outputs.tf
 + README.md