The airbag shouldn't go off that easy . There's two little plastic covers , one on either side of the wheel that come off to reveal a lug nut . Loosen these & the bag/pad should become loose (eventually) . You'll find some yellow wiring loom that connects to the airbag & needs to be disconnected . As far as I remember there's a bracket that may need to be removed also .
The safety aspect is entirely down to you (obviously), but I've done it & I reckon that it should be safe enough on a car that had not seen any accidents without being properly repaired (replaced sensors , control unit etc.) . I'm sure some would say that it's a risky business (& there is obviously some risk) but if they were that tempramental , they shouldn't be in a car in the 1st place .
I am open to criticism about this .
ps. I might be interested in your old steering wheel