Here’s a challenge that will help you improve your illustration. Your thinking. Your “eye” for things.
Do a series of 10 drawings of a subject you don’t normally draw. A lot of people do life drawing - but they never use the skills they pick up from life drawing for other things. They study drawing people, but then have trouble using what they learned from that to draw everything else there is in this world.
So. Pick a subject. That you never draw. And make ten drawings on that theme. Draw too many people? How about trying to draw ships? How about drawing flowers? Clouds are surprisingly difficult - so are bicycles (bicycles are one of the most commonly poorly drawn everyday objects out there).
What you’ll probably find is that you’re probably pretty bad at it. Despair not though, the truth of the matter is, none of those things is appreciably harder to draw than human anatomy. You’re just not used to drawing those things, but drawing anything from life is basically the same as drawing any other thing from life. Come to an understanding of your subject in all dimensions, and get it onto paper or your screen.