How to map a Shared Email inbox to MS Teams? Should we need to convert to groups first?

Hi,

We created a Office 365 Shared email inbox long back in 2014 - Example developer@MyDomain.com

Now we have started using MS Teams and created a team as Developer, automatically MS Teams created Team, Sharepoint Site, Group and Email ID as developer1@MyDomain.com 

MS Teams didn't alert us that already an email ID developer@MyDomain.com is in use, would you like to create a different email ID and / or didn't ask us to map to existing Shared Email Inbox.

Q1 : Does MS Team don't go with Shared email inbox

Q2 : How to change the email of the Developer Team, as we like.

Q3 : Can we convert this shared email inbox to groups and then create the developer Team

Any light in the tunnel would be great.

regards,

Sing