I advise strongly to stay away from any 'smith for trigger work- they quite likely will make it worse or cost you a lot in parts replacement.
Practice with the trigger, you can and will get better.
or if you really want a target luger- buy or make one!
There is a Mauser "Sport Modell" on sale here or the other forum- it has adjustable sights.
Or do what I did
, sorry for the fuzzy sight pictures :