Custom wiring help with accessories

[chrisp6108]

I still have my 93.5-94 marathon 4 cycle cart, lifted up 4 inches with 21" offroad tires and such just like the profile picture, but i finally got around to repairing and mounting my full fiberglass roof to my cart, but now i am planning to move my radio, cd player, font and back speakers on a small 400w amp, a large led light bar for forward and a small one for rear, and a led under cart light kit.

i need help with a wiring schematic to make this as safe as possible, what i would like to have is a master power switch to turn all electronics off with a flip of one switch, and also have a toggle switch for each device individually.

my issue is i am bad about knowing when to use relays and such, so im trying to make this as safe as possiable and the "proper way" vs what i've been doing which is just running power threw switches to the device which i know is not correct, any input or if someone wants to draw a schematic for me to help me understand i would greatly appreciate all the help!

i hope i didnt make this too confusing to everyone??????