Optimal AP settings

Hello all,

Newbie here. I have 3 APs deployed (2 U6 LRs and 1 U6 Pro) throughout my one-level home. What are the optimal settings to the radios that I should make? I feel like everything is on the 2.4g and 5g. I do have a lot of IoT devices and want them on the 2.4g, but I want more robust devices on the 5g. Thank you in advance.