UEFA released a fantastic tool for futsal coaches, written by Jose Venancio Lopez (pictured), former Spain manager and has contributions from Javier Lozano and Roberto Menichelli. It is available in six languages and is a guide for national associations delivering the UEFA B and also a bible for futsal coaches working at every level of the game.
It is almost 200 pages long and covers everything you could need to deliver futsal at whatever level you are working at. It is free to download and includes theory and practical sessions.
A lot of what was covered on my UEFA A and B courses in Spain is featured in here and a lot more.
I’d recommend it for getting a basic understanding of the sport and how to deliver it, plus for session ideas in most areas.