Your answer is here.
Please reads ALL of the subcategories listed that are of interest to you.
https://help.aol.com/articles/verizon-east-mail-migration-faqs-for-email-service-providers
On the plus side if you chose AOL ALL your emails folders and contacts are migrated for you.
This was my choice.
Advantage: Your email address does not change.
I then changed my Iphone,iPad and Outlook in PC's to work with "new" VZ AOL email.
Afterwards if you want to "hook up" with gmail you can do it.
My iPhone and iPad can also get my mail thru gmail.
Tom
QIP 7100 1,YAMAHA ATS 1080,QIP 7216 P2, iPad 2 WiFi,iPhone SE