Find a hoop, shoot some shots around, and you just get a good feel for the court, the hoop, what basketballs you kind of like, and just things like that, and just start to love playing basketball. And that's, I think that's the best way to start.
Some advice for getting started. I was very young when I started, so I don't know if this would be super helpful, but I have taught or been a basketball coach for a little bit. What helps the most, I think, is just getting comfortable with a basketball in your hand and kind of just moving it around. So I'll always tell kids that I'm coaching just to have a basketball by their bed and just kind of like throw it up in the air. Obviously, I don't like break anything, but just get comfortable with the size of it and how it fits in your hand and really practice dribbling so you can just freely walk around with it. And then, of course, work up to shooting and shooting around a lot will get you comfortable.
Something that helped me get started when I was playing basketball was to find a friend who also played and to practice like shooting hoops with them to get just advice on like form and just to work on building up your strength to shoot from far away. I think shooting hoops is really the best way to start.