Good advice from all above.
However, (and I don't mean to hijack a thread), I must point out that on this board, some of those giving advice are most assuredly NOT kitchen table gunsmiths.
Practice is essential, and should be first and foremost; however, the capable pistol shooter will, at one time or another, want to optimize the performance of their arm. There is absolutely nothing wrong with wanting to do that--as long as it is done competently, either by yourself or by a gunsmith.
Cordially, and with respect,
Your friendly neighborhood Powderman
(former military armorer, Colt certified armorer, Glock armorer, LE atmorer--and who, was at one time, a practicing gunsmith specializing in refinishing, refurbishing and customizing Smith and Wesson revolvers and that fine 1911 pistol.)
Hiding in plain sight...