Is hard to avoid wiring, either power over Ethernet (Poe) or wifi still need powering cable, there are removable battery operated CCTV+wifi can last 180 days which one way or another you got to charging too

Nowadays Conventional with DVR+CCTV / wifi or poe

Or

User friendly brand like tapo , Xiaomi and etc brand, each device need their own memory card and control everything from your phone or some are compatible with DVR or mix match wifi+Poe tldr is CCTV nowadays very user friendly , and they have a proper guide for self installation without much drilling involved mostly hard 3m double sided tape 2 year later removing it can pull off your wall paint if the wall is painted

Quality and specifications not all build equally some are software enhanced some the device itself is capable without much software enhanced is needed

Last is viewing angle some specification build for wide angle some for pointing far then got 1080p/2k/4k sensor and lens type just please don't get the fish eye type annoying AF when playback preview and the other last is build for indoor or outdoor

So you can start from here and survey the brand you needed if the brand meet what you need

Hope its help