What am I looking for? Lights controlled via a central system.

Hi,

I am not actually sure what to search for in terms of beginning looking for a product/system hence asking here so I can begin my search journey.

I am looking for a lighting system where I can have multiple lights connected to a single switch system - I already have one lamp that is hardwired but I think going forward they will be battery operated as I want to add lamps to areas further from a power source.

I do not want a system that needs an app or WiFi. I also do not need colour changing lights but it's okay if the lights change colour.

Essentially I want multiple sources of lamp lighting around my living room and I want to turn it on with a flip of a switch or a touch of a button but I also want a house sitter/guest to be able to do the same thing without needing to download an app, depend on me setting the app, or physically turn on 10 individual lights in a room. I also just don't like household objects connecting to the internet.

Apologies if it is a dumb question, I know nothing about lighting and don't want to deep dive into it (I become hyperfixated and I really want to avoid this) and just want to specifically look to meet only the needs I currently have.