If your domain is registered with Google, you can access your DNS Zone by logging into Google Domains and navigating to your Menu (☰) → DNS.

You can find detailed steps on how to manage DNS records at Google in the following official guides:

To connect a domain with your Hostinger services, use the following values:

If you face any difficulties while managing the DNS Zone at Google Domains, make sure to contact Google support directly. Alternatively, you can transfer your domain to Hostinger so you can manage your hosting and domain in one place.