Since you cannot download BitLocker for the Home edition, you have three primary options:
Unlike a third-party app (like VeraCrypt or GnuPG), BitLocker is a Windows component. It is installed alongside the operating system. If you are running a compatible version of Windows 10, the feature is already on your machine—it is simply dormant or hidden until activated. bitlocker download windows 10
If you are running , you do not have BitLocker. You have a stripped-down version called "Device Encryption" (see the section below on what to do if you are a Home user). Since you cannot download BitLocker for the Home
Select whether to encrypt used space or the entire drive and click . Solutions for Windows 10 Home Users bitlocker download windows 10