You need to follow from slide 11 onwards.
Create a new template or copy one of the standard ones.
Then at the metric family level you need to click on the 3 dots and create filters for each one and then you will see the metrics that you can select and configure in the right pane.
The filters are created but not necessarily used and are quite often left blank, but you have to create them, first, at every level.
You should use the filter at the top level so that the template is applied to correct devices - quite often I use the user defined field which can be specified in the main probe page for snmpcollector, after you query the discovery server.
Then specify this in the template.
If you don't see the metric you want from the generic MIB then you can go through the Self Certification process where you can upload a MIB and re-certify a particular metric family. This is done in UMP with the self cert portlet.
Hope this helps a little.
Regards