One thing I'm bad at in sketching is 'lighting'. Sometimes, it's hard for me to grasp light perception. And I've been stubborn enough not to do exercises to hone this fundamental skill, haha.
But reading this made me realize I should get back to practicing. You're right when you said that if you take your studies one step further, it will produce amazing results. Here's to better art! :)
This makes me super happy ! I mean not the fact that you feel bad at lighting. But that this post actually encouraged you to go back to the fundamentals and take it one step further, I am willing to see the result of your efforts!