To get any possible confusion out of the way: if you’re inquiring about getting a 7.9.X Vision project and moving it to a 8.0 Perspective project - this action can not be done in any way. Please refer to this previous post for clarification. If you’re simply inquiring about a Vision project, read on…
If you want to experiment with an existing Vision project during the Beta period, then install 7.9 on a clean machine, import your project, then upgrade to the Beta. This way you have a working Beta build deployed with a Vision project you can experiment with, but your existing (deployed/production) Vision projects are not at risk to any issues discovered during the Beta.
If you want to start a new Vision or Perspective project, then just install the Beta onto a clean machine and go ahead and get started.
Keep in mind that restoring a Gateway Backup and using it with the Beta builds puts any Databases and other Gateway-centric settings (Gateway Networks, Tag Providers, etc) at risk during the Beta.