Are low wings less safe for aerobatics training?
No.

It has nothing to do with the configuration, but the structure, the engine and the fuel system of your aircraft. The SportCruiser is certified in the Light Sport Aircraft (LSA) category and is meant for flying right-side-up. For aerobatics, you need


a fuel system than can still feed the engine when the load factor is less than or equal to zero,
an engine which can still lubricate all moving parts when it is experiencing a negative load factor, and 
a structure which can tolerate higher load factors than what you can expect from cruising along at 115 kts max in fair weather.


The wing location has no impact on aerobatic fitness. You might even argue that the unrestricted view up in a low wing aircraft helps to see better what is ahead in steep turns.