To perform ethical hacking, we have to download the Kali Linux Operating System and we can download Kali Linux OS inside the Virtual box. Here are the basic steps to download the virtual box and Kali Linux.

Step 1: Download Virtual Box
In step1, we download the Virtual box because the virtual box allows us to create a virtual machine inside our current operating system. After this, we will download the Kali Linux. A virtual machine is just like a completely separate working machine. You will lose nothing if you install an operating system inside the virtual machine. The operating system will perform just like the install on a separate laptop.

Now using the following link, you can download the virtual box according to your operating system and install it.

https://www.virtualbox.org/wiki/Downloads

After installation, the virtual box will be shown as follows:

Environment Setup
Step 2: Download Kali Linux
Now we will download the Kali Linux. It contained all the programs and application that we need to use pre-installed and preconfigured that means we just need to install this operating system and start hacking.

There are two ways to install Kali. You can install it as a virtual machine inside your current operating system, or you can download it as a main operating system. In this tutorial, I am going to use a virtual machine.

Use the following link to download the Kali Linux operating system.

https://www.offensive-security.com/kali-linux-vm-vmware-virtualbox-image-download/

Now click on Kali Linux VirtualBox Images and download the Kali Linux according to the compatibility of your operating system.

Environment Setup
Download the 64-bit version if your computer is 64 bits otherwise, download the 32-bit version.
The downloaded file has a .ova extension. If the file doesn't have .ova extension that means you downloaded the wrong file.
After downloading, you will get a file with .ova extension. Now, to install the Kali Linux, you need to just double click on the