Membership and Importing/Exporting

We are running the BETA site and upgraded to M2 and it looks like it BLEW OUT ALL of the Membership data. This is not terrible as we still have the live site going. However, I need to EXPORT all of the members from the old M1 database. How do we do that?

Also, we want to import an entirely new list into M2. Need to sync the member name and data and expiration etc to the new database.

Lastly, is there no option to manually enter a member on the backend?? We have cases where a member will ONLY pay with a check...so admin needs to create them an account with the correct membership expiration.

Please advise.

Doug Sooley