You have just created a new Gmail account but it does not have your contacts. So you need to open both Gmail accounts and copy email from your older account when you want to send mail to that person from new account. But this is not recommended because Gmail has an option to transfer contacts from one Gmail to another Gmail account easily.
Transfer of contacts from one Gmail account to other Gmail account is a two-phase process. In first phase, You need to backup contacts in your system from older Gmail. And in second phase, import the backup file in the new Gmail account.
Transfer Contacts from One Gmail To Another Gmail Account
Backup (Export) Contacts in Your System from Older Gmail Account
Step 1: Login into the older Gmail account from which you want to transfer contacts.
Step 2: Now click on the Gmail, written just below the Google logo and click on “Contacts”.
Import Contacts in Your New Gmail Account from Backup File
There is nothing complicated. You are only downloading contacts from one account and then uploading it to another account. You must know about this process of transferring contacts from one Gmail account to another Gmail account.
If you have anything to ask, you can comment below.