Probably better not to buy the Hi-Point. They work, and people report them to be reliable, but they are cheaply made of zinc castings, and they probably won't last long.
Further, they are too big and too heavy for concealed carry.
Further still, you need to make absolutely sure that you live in a county where concealed-carry permits are actually available. Most CA counties don't issue them.
For home-defense use by yourself, your wife, and, later, your child, I suggest looking at a 20-gauge shotgun with a 18" barrel.
If your wife can handle the weight and recoil, go for a 12-gauge instead.
In any case, I suggest that a pump-action shotgun will be easier to learn to use, and more effective in relatively unskilled hands, than will be any pistol.
However, both you and your wife should practice using it. Even a shotgun needs to be aimed.
If you insist upon buying a pistol, every seller knows that to ship a handgun into CA, a maximum-10-round magazine has to be supplied.
If the on-line seller with whom you deal does not comply with the law, the CA gunshop which accomplishes the actual transfer will have to take care of it, at extra cost to you.