PCB Design

So, I did the transition from schematic to PCB. I first made the 2 layer pcb, and then went to 4 because (as in image 2) the grounds are less then ideal. I decided that for not so much additional cost I can have a TON more ground in my board. Which, considering this is right next to my amp main pcb, should hopefully give me a bit more peace of mind…

I just am really confused as to how I’m supposed to via stitch. I have a ground pour on layer 2, and layer 4, and half of layer 3. I really don’t want any ground loop or some weird effects…