Actually they arent that hard they go in the same as the stock ones do same mounting clips and all. plus they already have the bulbs inserted in the housing.
I can help you with the wiring for the Halos and the LEDS its not to hard.

 

I will have to say tho dont get the ones that have the HID kit because they require you to upgrade your wiring so that it doesnt fry the harness

 

the wiring is deff a need with hid or higher watages in bulbs.
i always use existing wiring to trigger new relays and run new power wiring to new headlights because of that load.

however HID vs halogen is a night and day diff and i deff suggest that if you can do them you will not be disapointed.