Defining module

Terraform Providers Azure
1

I have installed terraform on windows. Below is the directory structure of how i have configured my config files.

D:\TERRAFORM_PRACTICALS\TERRAFORM-BEGINS
│   .terraform.lock.hcl
│   main.tf
│   main.tfplan
│   terraform.tfstate
│   terraform.tfstate.backup
│
├───.terraform
│   ├───modules
│   │   │   modules.json
│   │   │
│   │   └───network.test
│   │           resource_group.tf
│   │
│   └───providers
│       └───registry.terraform.io
│           └───hashicorp
│               └───azurerm
│                   └───4.26.0
│                       └───windows_386
│                               LICENSE.txt
│                               terraform-provider-azurerm_v4.26.0_x5.exe
│
├───mod
│       resource_group.tf
│
└───network
        app-nic.tf

my main.tf file is mentioned below

terraform {
  required_providers {
    azurerm = {
      source = "hashicorp/azurerm"
      version = "4.26.0"
    }
  }
}

provider "azurerm" {
   features {}
  subscription_id   = "##########"
  tenant_id         = "##########"
  client_id         ="##########"
  client_secret     = "##########"
}

module "network"{
  source="./network"
}

and under network there is one more file which i mentioned below

module "test" {
    source="D:/terraform_practicals/terraform-begins/mod"
}

resource "azurerm_virtual_network" "app-network" {...
}

My question is is there any better approach that i am writing this long path in source module of test or how can i define the modules and call them . Either i should create one directory called module and there i am defining other modules or this approach which i am following.