Many of these switches come in their own panel, mounting is limited to screwing it to the bottom edge of the dash. Sometimes, you may want to cut a hole (round or square) in your dash to mount the switch for a cleaner look. Slightly difficult, and can get hairy if you're clumsy.
Lastly, you may want to use an OEM switch. This means that you must find it and decode the pins on the back to make it work. This option allows for the cleanest looks, and is most often what I go for.

I'd installed literally dozens of driving lights, as well as lift kits, exhausts, clutches, trannys, motors, you pretty much name it. I've built full out race cars and monster street cars. I've also owned some junk, and ruined my share of vehicles as well.
I have no formal automotive education. I just had a lot of Legos growing up.

If you want to give it a try, go ahead and read all 2 pages of the instructions and make an attempt. You really can't ruin anything unless you attempt to cut the dash.
Some shops will discount an install if you buy the lights there -I've never paid anyone to install anything so I have no idea how much these things cost.