How can I monitor Ookami's usage?

This is can be done using XDMoD. XDMoD provides information like CPU hours, job size and many more.

Go to the XDMoD website.

Click 'Sign In' on the top right
Select the ‘Globus’ button to sign in via Globus Auth
On the globus auth page sign in with your Stony Brook credentials
Give Globus permission to send identity information to XDMoD (this only needs to be done once and is needed so that XDMoD shows information about your jobs)
XDMoD permissions only allow you to view your own jobs. Use the contact us button on the top right of the portal to request elevated permissions