Hi.
I see your are somewhat new at it, so i would suggest that you trace 1 or two drawings (By tracing i dont mean drawing on the lines with some paper you can look through, just look and copy). and thoughout the process, look at the lines, what do they tell you? and why are they placed how they are.
e.g Why are that fold there? Howcome the shoulder is placed there? howcome the arm is thin in that pose?
Try to compare it to human anatomy, and look at the traced picture again. did you make it entirely correct? and what is not correct.
After this, try to look at another picture. and draw that picture, but not tracing it, make another pose, another perspective, maybe other cloths.
(Please note, do NOT claim traced pictures as your own. so dont bother uploading em)
and dont ever make tracing a habbit, then you end up screwing your drawings in the future by memorizing what you traced long time ago.
anyways. after this, it would be a good idea to look at anatomy toturials (Which im really really bad at myself! xD) and then move onto posing toturials.