Some articles that may help:
Study any and everything about art you can. Keep what you like, toss what you don’t. Try to replicate the art you admire! Every artist, even “bad” ones can teach you something about art techniques or inspire you to develop your personal style.
2. Create…. Now!!!
Start creating. As soon as you get the art itch, act on it immediately. Even if its just a pencil sketch in your notebook. Youll strengthen the connection between you mind and the motor skills.
Dont know what to draw? An artist once told me, pick a subject and draw the same subject everyday, over and over again, for 6 months. This helps eliminate “mental fatigue” of deciding what to draw all the time, and after a while, you’ll have gotten into the habit, maybe even develop a personal style.
That being said, there are ways to improve a bit faster by certain types of instruction. It's always a good idea to get as much education as possible for the type of art you are wanting to improve on. For instance, I do a type of art/painting used with people with disabilities. Many of these people have limited hand/arm movement and some type of brain dysfunction, damage, or abnormality but there are easy painting tricks they can do to make an awesome landscape or still life painting in about 20 minutes.
My point is, just because something looks difficult, it doesn't necessarily mean it is. With the right training or instruction, you can learn tips and tricks that make things easier.
So in summary, study, take lessons either private or with public classes, watch YouTube videos, or just play around with things on your own to come up with your own personalized signature art.
One more thing....Keep in mind that what you think is your worst piece of art may just be someone else's favorite!
The best way to improve at art is to create it, again and again. If you like to write, try to write consistently - maybe start with 30 minutes every week and then more often. The same applies for painting, drawing, photography, etc. To learn certain skills, you can watch videos about art or take art classes on YouTube for free. For inspiration, you can go to your local library to look for art books, explore free websites like Pinterest (https://www.pinterest.com/), and see what other artists are doing on websites like DeviantArt (https://www.deviantart.com/) or Tumblr (https://www.tumblr.com/).