It is possible to use Emacs + evil without knowing Emacs inside-out, but you do need some basic Emacs knowledge. If you had to do C-x C-c when entering a non-evil mode, you did not have that basic knowledge :-)
The least you should do is the tutorial that's presented on the startup screen or "M-x help-with-tutorial".
The least you should do is the tutorial that's presented on the startup screen or "M-x help-with-tutorial".