Kudos for starting a daily habit of drawing! I feel like making a daily habit of anything will lead to some measured improvement. You got this!
It looks like many of the references may have been face-on, which are giving your drawings a somewhat flat look. If your subscription allows, maybe specify that you'd like to see some more 3/4 turn reference images. This may give you more practise making drawings that are more 3-dimensional, and get a better understanding of anatomy.
The above books suggested are really awesome! I'm familiar with a couple. But if books are not your thing, try checking out Proko on Youtube. Stan Prokopenko has a pile of amazing beginner tutorials and anatomy lessons to break down the shape language of different parts of the body and facial features.
Here's a drawing basics playlist you could start with:
https://www.youtube.com/playlist?list=PLtG4P3lq8RHHMNwxuVk0IcGRtPGHi4vN9
Keep going!
