I find your statement somewhat interesting but mostly absurd. What statistics are you sighting. A person who is relatively well trained and of the right mindset should be able to make rational decisions involving shoot no shoot situations. Also, being familiar and competent with your firearm should help keep you from shooting yourself, but I realize accidents do sometimes happen. I also understand that under stress strange things can happen but statistically I think more people have been well served by firearms than have been self injured. I would say check the FBI statistics.
The "relatively well trained and of the right mindset" is what is probably lacking in such an inquiry, hence my suggestion on pepper spray. Kind of like someone asked what is a nice starter car for their young son and people are coming out of the woodwork suggesting a widow-maker Jeep with the doors stripped or a 5.0 Mustang or something.
There are a littany of sources available on the internet, articles like the following
from Scientific American are a good overview; but yes, statistically you're more likely to injure yourself or a family member than you are to use a firearm in defensive gun use.
Honestly I'd rather not get into it, as I think this is entirely an inappropriate venue for it (and it really has no place on a hunting forum, and should get slotted to the 'Off Topic' space), and I normally wouldn't even engage but the responses suggesting "having 30 to 60 rounds on the weapon" for a guy asking an entry level question on a brand new account is a little much taking it in. Call me absurd all you like, but I'm not American, and espousing that a guy needs more than the standard US infantryman's WWII load (which I think was a bandolier of six of the eight round enbloc clips) as a baseline for home defense seems bizarre on the face of it from an outsider's perspective.
Similar to the trend of city dwellers who are obsessed with "predator defence" when they might spend an hour or two a year in light bush (whilst literal millions camp and hike without any such nonsense), I suppose I might be a little old fashioned or out of touch with the recent trend that everyone has to play some version of SEAL Team Six Halloween while living their quiet, benign family life. See also: Plate carriers at the range, coyote and arid brown painted everything despite being a thousand miles from the nearest arid desert, and all manner of flashlights and gadgets bolted on to a firearm or AR clone.
To each their own, I guess. But colour me thoroughly bewildered by it all.
Lots of good advice about taking a training course, familiarization, and practicing in there; I will say.