What Are Any Potential Problems With My Wireless Mouse, Keyboard Setup?

I will be buying my first iMac soon. I have never used a wireless keyboard and mouse. That leads me to my 2 questions. My desk is small and I have the Google Wi-Fi (router, with mesh system) very close to where my mouse and keyboard will be. First, will this cause any interference or problems between the Bluetooth connections or Wi-Fi signal?
Second, my keyboard will set about 6 inches below where the iMac will sit on a wooden shelf. Will this cause any problems or reduce connectivity?
—–
William Schrand