Does anybody know if there are assignements with this course and if so where we supposed to post it?

What kind of pencil is best to use for this course?

Well I would recommend you is to fill some page (2 or 3 A4 printing paper sheets) with some on your drawing (like objects, one or two figures or sample geometric forms. Try to put some texture and shading. Then ask the others (it can a Proko instructor or students on the discord) what are the strengh and weaknesses their see. If you shading is of and your pyramids looks "«strange" than may mean that you need to pick up the beginners courses and learn the parts you don't know. What is tricky about drawing is that to make good/ realistic art you always need to tackle every big (and even little things) you don't know. There's so much to know to have a solid fondation!