"I've discovered this forum when I stopped shaving (since May).
When I compare it to some guys here, my growth is quite slow. I am 30 years old.
Those pictures below show 4 months now. 
My goal is to get my beard thick, so we don't see through, but I guess I have to wait, every beard is unique."


I think you misjudge how nice your beard has turned out.  It really does look decent.