In general, the best strategy for importing will depend on the particulars of each user’s situation (i.e., what kind of vault item “types” you have, how the items are organized using tags or vaults in 1Password, etc.). I wrote the above guidance with the assumption that you are a single user who is storing only logins and passwords, and that you use different “vaults” as a way of organizing your logins by category.
Bitwarden does support enterprise solutions, including administration of users, access control, sharing of credentials, etc., but the details of how this is implemented in Bitwarden is likely different from how it is implemented in 1Password, which may affect the logistics of migration.
I would suggest contacting Bitwarden’s Support Team if you are already a customer, or their Enterprise Sales Team for pre-sale support.
To wipe your account, log in to the Web Vault app and use the Purge Vault option in the Account Settings.