Well how much time it takes depends a lot on the artwork, the details grade, your skill level, the motiv and also how you where feeling that day.
A few artworks linked here I could do in just two hours but others could never reproduce even not with infinite time because I just don’t have the skill or knowledge (yet ;D) .
I can make a detailed painting of a fox in 2 to 3 hours flat but I already painted a looooot of foxes, I know all the tools already and have put a lot of time into tweaking brushes and for a easy motiv I’m comfortable with I can skip all the sketching. I’m good with characters, backgrounds depend. Buildings with even complicated perspective are done pretty fast thanks to krita’s perspective assistants. But a landscape. Oh boy, I can spend many hours on it without leaving the sketch phase because I have no idea, neglected landscapes for years and already struggle with the workflow.
It depends on your style too. I’m more of a painter and that means I can completely skip outlining (which basically means drawing your whole picture a second time!) and can work with quite rough sketches because I make up some of the details as I go (happy little accidents).
I wouldn’t put much though into speed, especially not as a beginner. You will become faster when you start knowing things by heart.
If you want to challenge yourself you can set yourself a timer and check what you can manage to get done in a set amount of time. Two hours is a good time, great warmup and common for speed paintings. When the time is up you can analize where you took long and what you have to practice more.
Excellent site for this is
I use it when I feel like practicing.
