quartz and ceramic offers rather good protection against heat in this game tho
So, firstly, in this game ceramic and quartz don't stop AP (armour piercing) shots (use gel or cnct for this). Secondly, il'll be a lot better if you look for some schemes of tanks' interiors in the internet as this DO NOT look realistic at all. And lots of work with suspension of course. But for the first time (sorry, but only for the first) it's really not bad.
its quite ok for a first tank, there is a lot of first tanks and most of them are quite bad