Welcome!
Plenty of help available on here.
Only start or stop the lathe after setting the speed to Zero.
It is only a low power machine, so do not expect to take deep cuts and high feed rates.
(There will be others on here who will take issue with that. They know their machines far better than I )
The CL300 is essentially the same as the Chester Conquest or the Seig SC2, or SC3.
You will probably get better after sales service from Arc Euro, based on my experience of Machine Mart.
Howard