https://ga-dev-tools.web.app/query-explorer/

Query struct 1
metrics="ga:sessions,ga:pageviews,ga:avgTimeOnPage"
dimensions="ga:source,ga:keyword,ga:deviceCategory,ga:date,ga:isoWeek"
sort="ga:deviceCategory"

Query struct 2
metrics="ga:totalEvents"
dimensions="ga:eventLabel,ga:date,ga:isoWeek"
sort="ga:totalEvents"