Getting Started on MAC: Install Java

I am new to the MAC OS. I have set up a virtual MAC server that I can give you access to. You can use the NoMachine client to access.

I need to install Java (OpenJDK 16+) on the MAC and be able to use it.

Please give complete instructions on how you have done it so that I can replicate.

I will pay a maximum of $25 for this.