Trouble getting started

We purchased a family account, and I have had multiple issues getting things up and running. 

Issues that seem to be causing problems-

We use both Mac and Windows devices.

-Wife and I use a shared email and our own emails.

-Seems like we get passwords set, but then try to access the sites and can't. It seems like sites with more in-depth (high security) don't work well with 1Password.  This problem, in particular, is troublesome as it does not allow us to access important sites like Capital One.

I have watched some YouTube videos, but none seem to be helpful.  Any suggestions for help, specifically video help?

Thank you,

1Frustrated customer