Alright, even though I took no pics when I added the paddle shifters, I'm going to try to explain it as simply as I can. These pics are from the Russian website I mentioned earlier. Unless I can figure out how to make these pics full size you'll have to refer to the Russian website for greater detail.
https://www.drive2.ru/l/5660413/
First open the trunk and grab the lug wrench. You'll use it to remove the steering wheel. Now disconnect the battery. Locate the three holes on the back of the wheel. Using a flat tipped punch or something similar, one at a time insert the punch in a hole and poke around until feel a spring. Depress until you feel the spring release a corner of the airbag. Repeat for the other 2 springs.
Gently pull the airbag out to access the back. Carefully lift the 2 black clips (don't lose 'em, they're small and hard to see in black carpet) on the connectors attached to the airbag, remove the connectors and the single black horn connection. Place the airbag in safe place.
Line up the steering wheel straight and true. Disconnect the single connector that attaches to the clockspring. Unbolt the wheel and remove.
Now you need to remove the radio and cruise controls and disconnect their wiring. No screws here, just plastic tabs. The big black area at the bottom of this pic is of a semi-hard rubber material. The tabs are rigid. The bad news is you'll likely break the ones that the red arrow identifies. The good news is it doesn't matter. I broke them both (one per side) and when you snap the controls back into place they are as solid as ever. No big deal. If I were doing it again I'd try a bit of heat from a hair drier to soften those tabs.
Screw the paddles in place on the wheel. Now add your new wiring to your new steering wheel back cover and use the included wire ties and push pins to secure it all.
Attach the back cover and the radio and cruise controls. Reinstall the wheel and connect the clockspring connector. Reattach the airbag connectors and gently push down on the airbag until you feel the three springs engage.
BTW, the clockspring is what allows all the electrical functions to operate while you turn the wheel.
I had never messed with an airbag before this. It ain't rocket science, but if after reading this you still feel overwhelmed, it's probably best you not do it.