🚫 This Isn’t a Free Software Update
One thing a lot of us might forget is that the developer betas aren’t free. In order to download the developer beta from Apple’s own website, you’ll need to be part of the Apple Developer Program.
For starters, the program might not be available in your country, so you won’t have access. Secondly, you’ll need to pay around $99 per year if you want to be part of the program, which isn’t that affordable, especially for indie developers or regular people.
Paying $99 for a software update isn’t worth it at all, especially if you just want to use it to play around with it.
Granted, there are some workarounds to get the software update for free, but you’d need to get it from unofficial sources, which is pretty dangerous.
Not only would you be open to possible cyber attacks, but you’d the beta would be even less safe that way. Not to mention that it might even be illegal, and neither Apple nor us can recommend you do that.