I went to a workshop at Call & Response in London. It is a 25:2 ambisonic production art space and studio. I was introduced to ambisonic and 3D sound recording, encoding and production and I was trained to use their system to mix in 25:2. I used Reaper and Blue Ripple Sound O3A Core Plugins which are a set of essential tools that provide all the basics to produce a higher-order ambisonic (HOA) 3D mix.
This is the link to their website: https://www.callandresponse.org.uk/