I've been an artist my whole life. I started drawing at an early age. It was never a conscious decision to start painting. It came naturally.
My uncle, on the other hand, saw me painting and was inspired. So, he picked up some paints, got a few books and videos, and started painting. He mimicked other artists and techniques as well as exploring his own abilities. He found what came easily and what did not. He worked on skills he wanted. He's now a rather good painter. He's recently become interested in the old master's and is taking a class on their techniques. He really enjoys it.
Our motivations are different: I do art because I did it naturally and it brings me joy. My uncle wanted to create images and it brings him joy. You will have to find your motivation to paint. Why do you want to do this?
Then, I suggest, get some student grade paint (this means the paint is less expensive, not necessarily the cheapest in the store). Talk to those working there and they'll let you know what you need. I'd suggest Acrylic to start. it dries fast and doesn't have the extra materials and fumes that oils have, are less restrictive than water colours. Then, as we use to say, play in paint! Just dig in. Get a feel for different brushes, for how paint goes on the canvas or board, and how the colors mix. Try little bits and do be afraid of it. We promise, you can throw it away when you're done.
Classes don't hurt either. Try a basic painting course (but wait to get paints until you start if you go this route). They'll take you through the steps of exploring paints, how they work (how they mix, transparent layers, etc).
If you really want to do this, I'd suggest a class that will cover figures. This will help you develope an artistic eye. You'll learn about color pallet, balance, composition, even if you never paint something other than abstract afterwards. The skills you get from figure can be applied to abstract! And you'll probably want those skills later. Plus, you never know, drawing and painting might come naturally and you'll want those figure skills!
Most importantly, find your motivation to paint. Is it to sell, for fun, for relaxation, for friends? Find it and you'll know the rest from there. Have fun and bon chance.