Q: How do I put iCloud calendar on my android phone?

iCloud is an Apple service for Apple mobile devices - Android devices are not supported.

You can export iCloud calendars as .ics files from the Calendar application on your Mac, but how you put those onto your Android phone would be a question for an Android forum.

Also a quick Google Search found this: https://play.google.com/store/apps/details?id=org.dmfs.caldav.icloud&hl=en