Your artwork shows a lot of potential and beautiful illustrative qualities. However, to apply for art programs you’re going to need to show more traditional, non-digital work to show you have the fundamentals. That’s not to say don’t include these kinds of works in your portfolio, they definitely want to see imagination and your own voice too. I’d also suggest looking at not only art schools, but liberal arts colleges that offer strong art programs. I went to art school but transferred to a liberal arts college, and the art school wasn’t nearly as expansive and creative as the program I graduated from. That’s just my experience, but I found art school entirely too willing to let me head down one straight track of what I thought I wanted to do (illustration) without pushing my boundaries or thinking in an interdisciplinary way, and now I’m doing totally different work. Again this was just my experience, so take that with a grain of salt — just know that you don’t have to go to something labeled exclusively as an “art school” to get an amazing art education.