I forgot my password for purchases and subscriptions

You are sign in here .  .  .  with your Apple ID & Password.

Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.

You can’t merge multiple Apple ID accounts.

What happens when you use the same Apple ID that you use to sign in here?

See -> If you can't connect or sign in to iCloud

If you can't connect or sign in to iCloud - Apple Support

Check also ⤵️

1.

If your Apple ID is locked or disabled

If your Apple ID is locked or disabled - Apple Support (CA)

-> Get a verification code and sign in with two-factor authentication

Get a verification code and sign in with two-factor authentication - Apple Support

2.

If you can't make purchases or update apps, including free apps, you need to update your payment method or add a new one. 

because my Google email is out of storage

What do you mean by that?

Do you mean Google Drive?

If so, check your Google Drive free storage -> https://www.google.com/intl/en-GB/drive/

Check also ⤵️

See Google Account Help: Change or reset your password

https://support.google.com/accounts/answer/41078?hl=en&co=GENIE.Platform%3DDesktop

How to recover your Google Account or Gmail

https://support.google.com/accounts/answer/7682439?hl=en

If you forgot the Apple ID (iCloud) password, enter the Apple (iCloud) ID, and click Forgot Password. See if you can get a Rescue or Notification email option if necessary. Link to contact Apple Support at the end of the 2nd article.

Apple ID - Manage

Apple ID – Forgot Password  *