Try this project:
Take a sheet of paper and divide the space into 2 equal halves. In one half make a collage of black and white images. No color - this is important. Try to fill the space if you can.
Once done, get a pencil, eraser and ruler. Your job is to copy the collage into the other half as accurately as possible.
To do this, measure where every point is on the collage - any place where 2 edges come to a point, then plot that point in your working space. With or without the ruler, copy the edges. Then focus on how dark or light the part of the collage you’re copying is and replicate that.
After awhile you will find you’ll want throw away the ruler and do it by eye. Try it. You will find yourself drawing much better.
Some tips: you have to use pencil and paper. A screen is going to throw you off. You can always try it on a second or third attempt of this project.
This one project literally took my art mark from a failing grade to 85%, and everyone after swore I had a gift. It’s not a gift. It’s just a skill that develops with hours of practice.