Electric light auxilliaries hookup for Gem E4

As a newby In the NEV community I am pretty sad at knowing some basics when it comes to hooking up some electrical devices on my 2010 Gem E4, specifically the lighting. Car and boat experience don’t count here. The head lights with out the high beam option is inadequate in my view. I purchased a 72w led 12" light bar but with all of the chat on threads, I need help because I don’t want to damage any components so where do I source the 12v power to the illuminated switch and light? That’s first and second I want to install backup lights, again can I tap into the reverse switch which may be way above my experience or should I run a switch and power just like the light bar? after reading the threads about grounding can the frame be ground if not where?
Many thanks for advise.
Halaru

PM Grant West He has been through lighting issues