I'm thinking of making a digital painting. What would you suggest I used as a colour scheme, composition and style? Should I draw portrait or landscape, and what should the image be of? Also, Is there any application you think I should use to draw in specifically?
The most popular program for digital painters is Adobe Photoshop. You can also use GIMP, Krita and other programs that are based on it such as Piskel.
You can create a portrait with a simple brushstroke but if your art skills aren't good then try using more advanced tools like layers and filters.