Just watch TTV Talks About Drawing:
It's helpful in the way of understanding that you only need to practice to get better at art.
If you're going to be doing digital art, I would consider getting a drawing tablet as soon as possible. It makes everything so easy. In the downtime until you do get one, draw with paper and pencil.
And do it often. Once a day, or when you get bored. Pick something to draw and just try and draw it. Don't focus on getting all the details, just focus on drawing the shape of whatever you're drawing. If it doesn't turn out like what you were drawing, that's okay, just keep practicing.
I also recommend watching a lot of tutorials or speedpaints on YouTube. They really help you understand principles of drawing and show you processes and techniques that better artists use. That's mostly how I started improving in digital painting. For drawing as a whole, I'd recommend watching Draw With Jazza.
It really is all about practice. I started drawing from a really young age and did it nearly all the time. It's a lot of work and a lot of time, and it took me years to get to the level I am at now, but trust me you'll go from something like this:
(By me when I was, like, 5)
Hope it helps!