You can either buy a complete package, or make your own. The problem with making your own is the stupid sales policies that turns camera sales into the gray market with random shit from China.
If you go POE, then buy this guy:
https://reolink.com/product/rlc-423s/Sold only direct, compatible with Synology.
Otherwise Trendnet is just about the only manufacturer that's in the retail market and not gray market. Their stuff is okay. Better than random shit from China with built-in backdoors.
Whatever you do, don't buy something from Vivotek, Dahua, or Hikvision.