case fan

Hi I bought case and 7 fans. How to make good airflow? Dark Flash Knight K1 isn't typical case so i need some help. My setup is Gigabyte X570 Aorus Pro, RTX 3060 Ventus 2x 12GB, Ryzen 7 5800X, AMD Wrath Prism, 2x32 GB Ripjaws 3600 OC CL 16 DDR 4. In guide setup looks that.

I upgraded my case about a year ago and transferred over a few fans I had in the old one - so currently have 2 stock fractal 140mm fans and 2 cooler master 120mm fans in the case, plus 1 stock cooler master CPU fan.. that means 3 out of 5 of the fans are about 7 years old. I do blow the dust...