Here are the steps to recover your old Gmail account:
1. Go to the Google Account Recovery page.
2. Enter your email address and click on "Next".
3. Click on "Forgot password?".
4. You will be asked to enter the last password you remember using with this account. If you don't remember it, click on "Try another way".
5. You will be asked to enter a phone number or an email address that you have access to.
6. Google will send you a verification code via text message or email.
7. Enter the verification code in the space provided.
8. You will be asked to create a new password for your account.
If you don't have access to any of the recovery options provided by Google, you can still try to recover your account by filling out a form with as much information as possible about your account and how you lost access to it. You can find this form by clicking on "Need Help?" on the Google Account Recovery page.