What is this? It is a French term meaning painting outside.

https://www.youtube.com/watch?v=F86HvkQaz-o

This is a wonderful link, part art history, nice music, relaxing etc.
Then it moves on into the Plein Air painting of today. It is hosted by a publishing company who makes a magazine on this subject and also has a website. But it is a quality production in its own right.

This video only shows pastel and oil. But Plein Air can be watercolor, colored pencil, markers (there are nice watercolor marker/brushes out now), gouache (opaque watercolor) or casein (not very common anymore). It can be acrylic with no paint fumes, or even the new acryl gouache which can be painted over more easily than traditional gouache.

Here is a video by James Gurney--- he is a well known famous artist illustrator, who among many other things, wrote and illustrated the Dinotopia series.
https://www.youtube.com/watch?v=Acmswl4fxkk

He is using simple supplies, a small sketchbook with good paper in it, and doing a small study of a planting outside a building.
You could draw with just pencil, Plein air.

Learning the basics of drawing is helpful, but some learn as they go along. Betty Edwards has a wonderful drawing book you can learn from easily---Drawing on the Right Side of the Brain.
It appears that her video is no longer on YouTube. This book is available used on Amazon for a very low price and is in many libraries.

Once you learn the few basics...you can do any painting you want. It is not that difficult. Only different than other things you already do well... as mentioned in the Plein Air video.

There is a satisfaction in using the Right Side of your brain...it frees many tensions and emotions which tend to get stuck and not expressed during our daily lives. Add in medical frustrations and chronic illness...and tension just escalates.

You can be somewhat abstract in Plein Air, or highly detailed as your personality dictates.

Think about it... and even give it a try. You just might be very surprised at what you can do.