Hi there and welcome
If the account is still free you can, but you need to then forward all emails from this old account to the new account via the Gmail Fetcher.
Then tell people to email you to this new account as the old one wont be in use anymore.
To do this, you make a new account here
Then once created, you within this new account, set up the Gmail Fetcher to automatically fetch emails from the old account so they come into this new account.
You can do this by following the instructions on my link below
Then you can use this new account and still get emails from your old one.
Contacts you will need to copy over as well if you have any, if you do, let me know and I can explain how to do this.
If you would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.