If you want to use a handfun for home or self defnse, there are two parts tthat should be in your plan. First, you need to learn a bit about how handguns work, how to handle, operate, maintain and store one. A course like the NRA First Steps Pistol Course, which has two hours of classroom discussion followed by an hour of live firing.
Second, you will need to buy a handgun that fits you and the use for which you want it. We can provide assistance in selection of a firearm and holster or stoage system to suit your specific needs.