Need help installing a home Wi‑Fi box and configuring network

Hi there, I’ve just moved into a new place and need someone to install and set up a new Wi‑Fi box. I’d like the Wi‑Fi network to be secure, with a strong password, and the box placed in a central location for good coverage. Please help with basic setup, connecting my devices, and testing the speed. If possible, provide tips for optimizing coverage in a multi‑room flat. I’d prefer a tidy install with minimal disruption and can provide the box and router details.