At work there is an icloud calendar that I want to be a part of. I work from home but I only have a PC or android. What steps need to be taken to get connected?
From this, it appears that you can accept an invitation via iCloud.com on your web browser on a computer.
"Invitees to a private calendar must have an iCloud account and can accept the invitation by signing in to iCloud.com. Invitees can also accept an invitation using the Calendar app on their iPhone, iPad, iPod touch, or Mac.
If the calendar is being Shared, you need the URL of the Calendar. If you have access to the calendar, right click on it and select Subscription Settings.
Then click this Share icon
Then email yourself the URL and once you get the email on your device - click on the URL in the email (or send by Text Message) and subscribe to that calendar