I have installed the Enterprise trial, log monitoring works fine for me, but I´m not able to get metrics into Splunk.
When I open the Search & Reporting App I get 4 tabs at the top of the screen:
Search, Datasets, Reports, Alerts, Dashboards
But at the Splunk website I see 5:
(Products > Splunk Enterprise > Get Answers Faster with Metrics)
Search, Metrics, Datasets, Reports, Alerts, Dashboards
So are Metrics not enabled in the trial?
As per this documentations, the metrics is enabled/available on all types
(Splunk Free / Splunk Light / Splunk Enterprise / Splunk Cloud)
https://www.splunk.com/en_us/software/features-comparison-chart.html
which version do you look at ?
Splunk 7.2.0 (build 8c86330ac18)