It took until the day I bought a real gun belt to get comfortable.
No-one will notice; how many people have you personally spotted carrying? Keep in mind guys here and like yourself are more prone to spot someone, but less likely to care; "normal" people aren't going to notice unless you expose your gun somehow.
Do be careful bending down or reaching up, that is how guns get exposed and spotted.
You will not have a ND while the gun is in the holster. Period. Modern guns don't just go off by themselves. If you need to prove it to yourself (I did

) put a snap cap in the gun, holster up, and go about your routine. Do some extra stuff, play with the dog, do some jumping jacks, whatever it takes - at the end of the day, look at your gun and see that the striker, hammer, whatever never moved. Since you will likely carry it cocked-and-locked, take two days. I would not advocate carrying a gun you had to cycle before using, but that's me.
The cops depend on the State you live in, which you don't have listed. Here in Arkansas, no, you won't be stopped. If for some odd reason you wind up displaying your weapon to one, they are more likely to ask to see your license (verification you can carry it) and then give you pointers on how to keep it from happening again than make a scene and arrest/ticket you. We've got excellent guys down here though, and YMMV, but I doubt it.
I carried a P-95 first (I am not a small person) but have started carrying a 6904.