Having own Custom email address is always a benifited one rather than the some cool email address which may be not consider very valuable in profession. I had the same experience and then I bought my own name domain name and setup my custom email id.
Truly my interview went around only that email address and DNS working. I highly recommend to own a domain which will open lot of doors to learn about the internet and other technologies. In this quick video I showed how to setup your custom email address and mail box which is free forever provided by Zoho and Personally I am using it since 2015.
Follow the step by step to setup the email address for your own and for your business also.