My smallest handgun is an LCP Custom. It’s pretty much the same as the original LCP but with a slightly taller front sight. I like it. Addng a Hogue Handall grip sleeve made it more pleasant to shoot. Recommended, the pistol and the Hogue grip.
Next smallest that I have is a Kel-Tec P11. It’s recently been discontinued, but used pistols for sale are probably still around. I wouldn’t recommend that one. Very heavy trigger pull and you have to be careful with your grip on it or it will jam. I bought it mainly because capacity is good for a pistol that small, it will take magazines from my S&W 5904, and my experience with revolvers made the trigger not too much of a problem. Buy something else.
With my Kel-Tek P-11 I found using the grip extension made a huge difference in “limp wrist” jams.