Cameras are unusual on a home network because they upload constantly. Home connections are built for downloading, so several cameras streaming out can saturate the upload path and slow video calls for everyone.
Storage is the next decision. Cloud recording is convenient and survives theft but usually needs a subscription; local cards are cheap but fail silently and are lost with the camera.
Motion alerts drive most disappointment. Sensitivity set too high produces constant notifications until people ignore them, and set too low it misses the one event that mattered.
Security deserves real attention. A camera is a microphone and a lens inside your home, so a unique password and two-factor authentication are not optional extras.