Proper guide for Google Ad Manager Needed

Hi kindly guide me about google ad manager what is the requirements to join this network and is it safe than admob and there’s no suspension? also can i monetize the app by simpliy pasting the ad ids? or there is much more i am missing? like minimum traffic etc… to use this network

Need ADSENSE Account

And You Can Also Check That Post For Admanger Setup

no approval is needed for ad manager ? the ads will start working right away?

my adsense account is verified via pin aswell.