I can't even draw skeleton

[queen peak]

Are you using a reference?

[runic marlin]

Ye

[sudden smelt]

You already added the horizontal lines (it should be 7 to 7 and a half though), so why not also just art a box around it so you don't draw him too wide.

[runic marlin]

I already did that

after half head I draw line for chest and after after full head I draw line Shoulder

[worn spear]

Do it with measurements and if you can’t draw the bone shapes properly, try training them separately