I've been drawing a lot every day, focusing on improving as much as I can.

I'm a bit worried that I am not improving at my full potential rate, as if I'm possibly not making enough progress as I should be
with the right practicing methods.

I come here to ask, what would be the best thing one should do to improve at drawing as fast as they can? Maybe certain daily challenges or exercises to try every day?

Any opinions/information on this would be great.