JJ find these matches in your area an watch, ask questions. You will find valuable info. Some will allow you test drive their equipment.
Unless you have a hang up with name brands go cheaper.
I own a Gold Cup Series 70 National Match which is legal in both, but don't. I brought a 400.00 Philippine made 1911 45 acp. It filled WB shoots 99.9% of all my needs. And if I chose it exspend more practice it would be perfect fit. But I upgraded to a Ruger 1911 with adjustable sights for about 650.00. And it runs.
Shotgun SXS, 97, Win 12 oh the choices. Lever Gun 1873, Marlin 44/40, 45 Colt. Where will it stop!
3 gun the Ruger will fit 100%. Quicker recovery would be a 9mm. You are not required to shoot SA's centerfires, wheel guns are fine. I started 3 gun with rimfire SA handgun an 10/22 stock rifle, 12ga pump at placed nicely.
Then WB riggs, outfit, etc, etc,
Now that I bent your ears go to to some shoots, more the better, more ideas the better.
Then think reloading! :)