Learn how to draw using basic shapes. Shapes being spheres, boxes, cylinders.
Start with these basic shapes, using them as your guideline, keep drawing.
Everything that can be drawn can also be broken down to these basic shapes.
Once you start figuring out how to use these, you'll be able to draw everything with more ease.
All artists starts with basic shapes.
If you find yourself using more than 5 strokes to draw something, that means you don't know enough about the object to draw it.
When this happens, take the time to learn from a reference. Learn how it works in real life, then draw it accordingly.
Trace the object, copy the object, whatever that will help you learn how to draw it, do it.
You don't always have to draw it to learn how to draw it too. You can draw something if you make notes of where things are.
Mentally drawing it works just as well as physically drawing it.(I don't mean seeing the final project in your head. I mean seeing yourself draw each and every line.)
Keep drawing and learn how to draw things with as few strokes as you can.
This won't happen instantly but if you keep reducing it by 1 line each time then you'll definitely get there.
The key, to learn and improve quickly, is to know what information you're missing and learn it.
This is how I improved. This is what I tell myself whenever I see, or feel, something wrong with my art.
"I don't know enough to draw this. I'm going to learn how to draw it."