Is this a "play" gun or is this a self-defense firearm? How mechanical are you?
While it is a relatively simple procedure, I'd recommend that you have a good smith do this for you to make sure that nothing goes wrong. The trigger is the only moving part that you actively engage in order to fire the pistol, -you don't want to mess up that during an emergency.
Since replacement triggers are made oversized, they will need to be stoned along the front, top & bottom of the trigger, also you need to know how to check & set the bow & body for tightness, AND very importantly, you need to make sure that the rear engagement surface is properly set to meet the grip safety/ignition group.
If you do use a smith to fit the trigger, you may as well have him do a complete trigger job with upgraded sear & disconnector to match. This is sometimes called a "reliability package".
Or, maybe all you need to do is to replace your standard grips with slim grips.