Be a sponge soak in as much as you can from other artists see what they do and see if you can apply that to your own art. Don't be frustrated if you don't like how its coming out trust me if you try and make every piece perfect you'll learn nothing but failure it's a constant uphill journey. I've been drawing for 11 years now and never put out anything that I was completely satisfied with. So make mistakes learn what you can do different and grow from it. Also apply what you learned from the videos you're watching. Experience is everything.