... I have read about 1 and 2 stage triggers and am completely confused. ...
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Single-stage triggers are one steady pull that works the sear from the beginning. They are generally preferred for "action" shooting.
Two-stage triggers have some take-up that doesn't move the sear, then some additional travel that does. Since the second stage is just a little bit heavier than the first it feels really light once you get to it. They're generally preferred for "target" shooting like DCM or NRA Highpower and varminting.
Many people like two-stage. I prefer single-stage.
JP, Accuracy Speaks, and the factory triggers are single-stage. Jewell and RRA are two-stage triggers. JP & Jewell have set-screws to get perfect adjustments so they're great for target/game guns. RRA and AS don't, and thus are preferred for "work" guns because they can't come loose and jam up.
A gunsmith can do some work on the trigger, but any of the aftermarket triggers will be much better. Depends on how much you can afford and what you like.