Download the WINDOWS.X64_193000_db_home.zip (approx. 3GB - 10GB) from the official Oracle Database 19c Windows Downloads page .
But here’s the catch: Oracle isn't exactly known for a "one-click" consumer experience. If you’ve tried to find the actual download link before, you’ve likely spent 20 minutes hunting through confusing OTN pages. Download Oracle 19c For Windows 10 64 Bit