This first build also doesn't include every new feature that will eventually arrive with the general release.
For most people, it's best to wait for the general release starting in October. You should never download a beta on your primary device, only on a tester device if you have one. However, it's important to note that beta versions, particularly early ones, tend to be buggy.
If you're a member of the Windows Insider Program (you can sign up now for free), you can download a preview build of Windows 11 now. How to download the Windows 11 Insider Preview build
