There is always some level of risk when running the latest versions of something however the new scanner code is separate from the existing one so creating a test library shouldn’t interfere with your other libraries.
It’s always best to have a recent database backup in case something does go wonky you can then just install the stable public version again and restore to your database backup.
Yep, it’s expected that these libraries created with the new scanner are just temporary and you should ideally remove these anyway once you’re done testing with them.
The ideal situation if you don’t want to disrupt the operation of your normal server is to install this somewhere else completely (virtual machine, docker, different PC, etc). You then don’t have to worry about it affecting anything on your main server.
