Don't Install the macOS 10.15 Beta if You Can't Handle Problems
If you don't want to deal with macOS 10.15 beta problems, do not install this update on your computer. While Apple definitely tested this internally, there will be issues that prevent a smooth experience throughout the beta.
That's part of the beta process, and it's why Apple allows developers and the general public to test it out for several months ahead of the full public release.
If you don't want to deal with any macOS Catalina beta problems, you should wait until the public beta, until several beta updates arrive or skip the beta completely.