@wojtekfedunik https://www.youtube.com/watch?v=Y83FLL6TqF0 This should get you started, just follow along and you should be able to make your own in no time! Also as far as I can tell there is no right wrong way, some people making super high poly model first and then use Zbrush or other retopology tools to make a low poly…
First of all sometimes you don't really need hi-res model and could start with normals editing(face weighted normals ) and then just paint few dents and imperfections to normal or depth channel. If you really want hires model an easiest way would be first subdivision for rounded things and then re-mesher in Blender or…