Study your family or friends or people in the house, car, malls, etc. Make quick study sketches of them in a room. They don't have to be perfect drawings just an aid to help you get an idea of how the pieces fit in a puzzle. After awhile you won't think perspective but will think shapes. Negative spaces, positive spaces.
Sketch a bottle, then a bottle on a placemat. Then both on a table. Then all three in a room. Then another rooom off the main room. Start small and work into it. It's easier than you think when you study things you are familiar with. Sketch your bottle from standing above it, sitting level with it, below it. It's all angles and shapes. It's all an illusion and how you use shapes to create your illusion. Don't get discouraged, just take one step and when you can get one go for two, and on and on. Cute sketch, btw.