I need Help Understanding Vehicle Roles and Equipment

I've recently downloaded the mod and had a quick glance at it. I'm curious if there's a glossary or a reference page available that explains the purpose of each vehicle, along with the equipment and personnel associated with them that is in English or can be translated. As a newcomer, it's a bit confusing for me. I did come across a tutorial on YouTube, but it was in German, and I only speak English. I prefer written instructions anyway, as I can follow along while playing at the same time.