Hey,
The following guide covers the process of FCI configuration.
https://www.starwindsoftware.com/resource-library/starwind-virtual-san-installing-and-configuring-sql-server-2019-tp-failover-cluster-instance-on-windows-server-2016/
Always On Availability Group: https://techcommunity.microsoft.com/t5/itops-talk-blog/step-by-step-creating-a-sql-server-always-on-availability-group/ba-p/648772
Cheers,
Alex Bykovskyi
StarWind Software
Note: Posts are provided “AS IS” without warranty of any kind, either expressed or implied, including but not limited to the implied warranties of merchantability and/or fitness for a particular purpose.