As others said AP is easy if you are not fully techy - just get either Ubiquiti or TP-Link. TP-Link's are cheaper and offer better coverage but are physically bigger.
Router though all depends on what you are after and your tech knowledge. Personally I would go for a Draytek as they are easy to setup, are virtually bomb proof; Draytek2865 is a good option as would give you future proof if you ever get 1Gbps FTTP, but its £200+. Other options are Ubiquiti's Edgerouters, Mikrotik or various consumer routers, as 100mbps even the lowest of low routers can handle.
Also don't buy WiFi6 kit yet, wait till the next version with 6GHz is more available, that's the one that will actually bring real improvements.
Edited by deleted (Mon 19-Jul-21 09:20:55)