All kids have a lot of imagination and drawing ideas. They see an inspiration in even the smallest and unimportant things. They could, for example spot the fly in their bedroom and will immediately try to draw it. If they will not be pleased with the result, they will try and try again. And when they are finished and happy with their product, they will proudly display it to their parents and family.
And that's how it should be forward, when they/we grow up and become an adult. We should be proud of what we drew, even if its not the best. Adults often have a lack of imagination and cconsequently lack of inspiration.
No one is asking you to pick up a pencil and draw a masterpiece that people from all of the world will admire. But you just have to start somewhere, and believe that you can do it. If you don't have an inspiration, lay in bed and start thinking of what is beautiful for you. That could be nature, flowers, your kids or your wife... Something that is important to you. And that's the beginning of drawing process.
Than, to warm up, just start to scribble on a blank piece of paper that you will throw away after finished. Practice drawing round circles, lines, dots... For example, draw a circle and start shadowing it with different kinds of pencils and on different sides. You will quickly see what looks the best.
And than, the real process begins. Try to start just with brief sketch. Draw the main lines, than go and draw the details. The last step in your drawing process is shadowing and making corrections to your drawing.
If ordinary sketching just isn't for you or is too hard for you because you're only a beginner, you can try to draw observing different step-by-step drawing tutorials or try one of the many drawing apps you'll find on Google Play store. First, you can try to sketch on your smartphone or tablet, and when you get some experience, try yourself in traditional drawing by hand.