>>5940717Regarding the design aspect, a lot of people who design armored vehicles focus on making them look cool, and add some random parts to make it more detailed. These designs are just fine, the same way that most people won’t notice if a character’s anatomy is a bit off, but the best designs (imo) have some real-world influence that consider practical aspects of the vehicle.
There's plenty of videos on the internet of tank nerds autistically obsessing over armored vehicle design, why some design elements do and don’t work, as well as the different roles that vehicles may play. If you want to draw a shitton of vehicles, you won’t necessarily need a shitton of designs, just at least one vehicle to fill each niche, even if it’s not particularly well designed for that role.
Learning about the mechanics of a vehicle helps a lot too. Internal and external components have influence over how a vehicle looks. Things like smoke launchers, spare parts, antennas for radios, and vents for engines are all details that add visual noise which make a vehicle more interesting to look at.