As the responses indicate, lots of 45 acp pistol options out there. If the OP has friends that own 45 pistols, then going shooting with them would be a good starting point. Also a lot of gun ranges now rent pistols. You'll probably have to buy their ammo to use them. Range I go to rents them for $5.00. Box of S&B 45 acp is $15 m/l. So for $35 you can shoot 4 different pistols 12 rounds each.
Way cheaper than dropping $400 to $600 on a pistol and then finding out it isn't right for you. Only way to tell if a pistol fits & shoots well for you is to shoot it.