Hi Gravity,
Well done for having the courage to upload some stuff to here! It’s definitely a good place to pick up some tips!
In my first year of Uni we had a full 6 week project to just draw cubes in perspective, starting with single cubes at different angles then moving to collections of cubes with shadowing.
This might be a good exercise to practice with so you can get to grips with perspective and how things should look when you get them down on paper 
After that, you can use the cubes as construction lines to draw products in.
Other than that, as Gmay said, burn through those pages - practice makes perfect
I’m looking forward to seeing how you progress!