Limpwristing is certainly a possibility. Nothing to be ashamed of :?
The uncentered, light primer strike is probably due to the slide not returning fully to battery after your shot. I had this happen twice, but I'm nearly positive mine was due to easing the slide forward on a new magazine, and not letting it slam home.
If this happens again, check the slide before ejecting the mag & clearing the round; see if it is all the way forward. It may be just a millimeter out of battery, but that's enough to cause the misfire & off-center strike. If it's not fully forward, see if you can determine why; after clearing the gun, rack the slide slowly by hand, feeling for any points of resistance that would slow it down when travelling forward after a shot.
Be certain there are no obstructions to the slide motion.
Remove the slide, and give a everything a real good cleaning, too. Concentrate hard on the slide rails, both on the frame and the slide itself. Make certain there is no grit or brass flakes in there. Might want to inspect the guide rod & recoil spring to be sure it is clean and free-moving.
After a thorough cleaning, give everything a good lube job. Make sure the rails are oiled well (well doesn't mean heavily oiled, as I'm sure you know - just completely and lightly coated). Cycle the slide by hand several times to see how it feels.
Often there are quirks in new guns that can be figured out. I had a "click" in the trigger of my S9 - annoyed the hell out of me. I took the gun apart, found the source of the hangup, and was able to fix it fairly easily.
See if you can find what's binding. And if there's nothing, maybe it is, in fact, your grip and/or limpwristing causing your issues.
