Step 1: You download sql server 2019 evaluation here: https://www.microsoft.com/en-us/evalcenter/download-sql-server-2019
Step 2: You run setup file
Step 3: You select Basic
Step 4: In “Installation type” tab, you select “Perform a new installation of SQL 2019”
In “Product Key” tab, you select “enter the product key”. Then you copy and paste sql server 2019 standard key
Step 5: You install SSMS https://learn.microsoft.com/en-us/sql/ssms/download-sql-server-management-studio-ssms?view=sql-server-ver16