Separate your router from your APs. ER605 is about 60 USD. Handles multiple uplinks as well. If you're not interested in the nuts and bolts of networking, get an Omada class AP from TP-Link and use the Omada software to configure everything.
For planning, get a 'wifi analyzer' type app on your phone. Are 2.4GHz channels jam packed? If so, 5GHz might be a better option to optimize for, if you don't have legacy 2.4-only devices.
Separate your router from your APs. ER605 is about 60 USD. Handles multiple uplinks as well. If you're not interested in the nuts and bolts of networking, get an Omada class AP from TP-Link and use the Omada software to configure everything.
For planning, get a 'wifi analyzer' type app on your phone. Are 2.4GHz channels jam packed? If so, 5GHz might be a better option to optimize for, if you don't have legacy 2.4-only devices.