I would suggest you to read the help documentation as it is the best source. Pretty much all your questions can be answered by it.
- I want to share some passwords only with my wife (financial stuff and Amazon).
Is this working with one “Organization” (Family)?
A) You can share logins, identities, credit cards and secure notes by using organizations. An organization is mandatory for sharing credentials across users.
For more info:
https://bitwarden.com/help/article/what-is-an-organization/
https://bitwarden.com/help/article/organization-videos/
https://bitwarden.com/help/article/getting-started-organizations/
You can do all of these by taking advantage of User Types and Access Control.
User types: https://bitwarden.com/help/article/user-types-access-control/#user-types
Access Control: https://bitwarden.com/help/article/user-types-access-control/#access-control
Yes, you can use passwords located in your vault or collections.
An account is required for both your wife and daughter.