Getting help and advice from one of the many experts here at Microsoft Community does not cost anything.
Whenever you receive a phone number as an answer and feel uncertain whether it is from someone at Microsoft, don’t take the risk,
confirm the number is for official Microsoft Support.
It is never suitable to install a beta on your main computer. It isn't even safe to install a brand new, released operating system on a main computer. Try to wait until the major disasters have been discovered and fixed. Six months is not wrong.