some drawing resources but almost all drawing related resources for portrait and figure drawing.
Q_#0. so how much drawing do i need to learn for sketching logos like a professional logo designer.
and also i ask some questions in the image captions.
Q_#1. in this sketch is those lines are some kind of a grid system or something else. and is those circle are created with just hand or used any tools for accurate circle.
Q_#2. i think this type of design are called geometric design or something like this. how can learn and draw like this.
Q_#3. what i need and how i can draw this types sketches. and from where i can learn.
i would be grateful if you could help me. thanks