Your mark making skill is what you should focus most on in the future because it's a really important aspect you will improve at.

Your lines tend to curve quite a bit sometimes.

It's not that easy to explain exactly how to improve at it since it's something you'll learn by focusing on everything you do motorically when doing each stroke.

Try to think about these questions when drawing:

• Am I drawing from my shoulder instead of my wrist? / is my wrist really "locked"/not moving?

• Am I rotating the page correctly for each stroke?

• Am I holding the pen too tightly? / Is my body too tensed up/stiff? (Holding the pen rather lightly and being relaxed physically and mentally is recommended, though it's hard to force yourself to be relaxed)

• How should it feel when the tip of the pen slides across the page, how much should I press it down?

• Is my wrist resting on the page when drawing for additional stability? Is it obstructing the stroke by creating too much drag?

• Would my Strokes improve if I didn't rest my wrist when drawing?

I could go on and on, these are questions that helped me.

You'll have to observe yourself when drawing and constantly try out different techniques/subtleties in order to improve.

Mentally you should accept to fail, only then can you draw in a relaxed state and draw decisive, confident strokes.

I hope I didn't confuse you too much, have fun

Sebastian