Easier than replacing a light bulb in your house. Type 194 wedge bulb. Turn the socket and remove from headlight assembly. Pull off the factory bulb, insert new bulb. Stick the socket back in and turn to secure.

Don't waste your money on LEDs for the horns. Been there done that. The LEDs are just not bright enough and despite claims of longivity, one of mine went out after a month so now I'm back to the factory yellow bulbs and it looks great.