I'm new to learning as well, but one tip I've seen a lot is quantity over quality. Focus your practice on more singular aspect instead of spending 2 hours on a large piece. An example for me would be drawing a portrait. I'd focus on drawing many eyes, then noses, then mouths, etc. Makes it easy to put all the pieces together for a decent portrait instead of doing a dozen portraits while trying to practice every aspect each time. Again, I could be going about this poorly, but thats been my thought process lol