Dell OpenManage?

I'm a newb when it comes to system administration but I'm trying my best to learn a ton of stuff. Can someone give me a broken down description of OpenManage and what I need to get it running with the servers?

All the servers are Dell's but some are optiplexes. Some have vPro.

None have DRACs, some/most/(doubfully) all have the baseboard management controller.

There's only one device on our network that isn't dell and thats a QNAP NAS which we'll have to figure out something to monitor the drive health.