I think it's best to find a style you want to work in. Have an idea of what you'd like your art to look like. That way, you know where you want to be in terms of art and you can follow the corresponding steps to get there.
For example, I like cute Japanese-inspired cartoons with thick lines, bold colors and minimal shading. Therefore, I figured the best program for me to learn was Adobe Illustrator. I got Illustrator and just practiced on my own until I got used to it and little by little I've learned how to use it quite effectively (in my opinion ).
I'm in university too and finding classes that use Illustrator is a bit hard i think but I saw your gallery and if digital painting is the type of thing you want to do, I recommend taking digital art/illustration classes. I'm sure they'll probably be using programs like Photoshop (maybe with tablets) since Photoshop is basically the digital standard today. Ask around the university and find out if they teach more or less the type of stuff you want to learn.
If you have any more questions, feel free to ask. Good luck!
I've never taken a course in Digital Art. In my opinion, while courses can be great and all, I find it's much more rewarding to do a ton of practice, research, and whatnot on your own. Professors can sometimes push you into a style they prefer and can steer you away from where you want to go. I find art in styles that I like and reference them so I can improve. It's much more fun (and it's free)