After installation, you'll need to activate your copy of MS Office 2019. To do this, follow these steps:
Sign in to your Microsoft Account Services & Subscriptions page. Locate your Office 2019 product and click . index of ms office 2019 64 bit link
For less than the cost of a pizza per month (via Microsoft 365 Family) or a one-time payment of ~$150 for Office 2021/2024, you get the official installer, automatic updates, and 1TB of OneDrive cloud storage. After installation, you'll need to activate your copy