I bought the same one and should have it this weekend. When I get it hooked up I'll let you know if Dahua, Hikvision and some of my cheap cameras work with it. Most of the time this type of NVR will have problems with Motion detection events from the camera, but seem to record 24/7 just fine. I have used this type of NVR and have had little problem with 24/7 recording.
For now look for IP cameras that support ONVIF 2.4 protocol. Cheap noname 2MP cameras on Aliexpress would be the imx322 sensor and imx291/290. The camera choice depends on the environment (lighting), distance to object, speed of object , area of coverage, pixel count requirements at the distance of object and of course mounting options.
Good luck,
Chris