The first step to beginning art is to grab a pencil and a piece of paper. It doesn’t matter what kind of paper. Plain old printer paper will do. One of the first ways people create art is actually by coloring in coloring books. Some wouldn’t consider this art - as the pictures have already been drawn and most kids simply scribble - but coloring books for adults are all about calming down with activities from childhood. This art form is much simpler and easier to access for everyone because all you need is a few colored pencils or crayons.
However, there are plenty of ways to start creating original art too. The best way to do it is to pick up a pencil or a pen, a piece of paper, and start drawing. There are plenty of online tutorials and how to draw books that could be helpful.