The public beta (what is more appropriate for the original poster & other non-developers) of macOS Big Sur is now officially available: https://beta.apple.com/sp/betaprogram/guide#macos
Anything before this was not recommended for non-developers, people that need their computer & data to work reliably, etc. Even then, this public beta is still a beta. Things will still not be working entirely correctly (including third-party software that hasn't updated to support the new version yet [since it's not officially released yet]) even with this being a publicly-available beta (key word still being beta.)
If you need things to continue to work smoothly, the official release isn't too far away & you should probably wait. Keep in mind that even official releases can have some bugs (many potentially having to do with third-party software, at that point) so getting it earlier & earlier before then just leaves you open for more & more problems (definitely shouldn't step outside of what upgrade profile you officially have like many have suggested here since you then can't get proper support if/when things happen.) Of course, I wouldn't hold off on an official release (when that happens in the next couple months), though, unless there's a known compatibility issue with something you need.