I'm trying to improve drawing realistically, with little progress. This is a drawing I did about a week ago, and any input would be appriciated. I can't draw shells for crap and I'm no good with the pencils I was using, and I'm not very good with shading (I started getting very lazy towards the end)... I need to improve in all areas.
It's a drawing of my camera:
Ew. It looks worse all big when you can see all my crapwork.
Also, an older friend who has spent time in art school said I need to use more angles? I'm not entirely sure how to express this when drawing.