Hello, I just purchased to test it out, but when I went to activate my account you have a warning: We strongly suggest signing up with your calendar provider to sync zcal events

I do NOT want to sign up with my gsuite/gmail account because I only use the account for Google Calendar and NOT the gmail that I never look at. If I sign up with my main email, like Calendly, am I even able to use my Google Calendar? I really don't like the warning....not a good sign. Thank you