No.
You can't just wake up in the morning and draw a sketch that would be the prize of your portfolio.
Learning to draw takes years of practice! Not just off and on, I'll-draw-when-I-feel-like-it practice, you have to practice your technique EVERY SINGLE DAY if you want to improve it to the point where you can be a good technician. If you want to be a good artist, you have to have creative talent, and I can't teach you that.
So... I shall teach you how to be a technician. Whether or not you are an artist, you'll have to find out for yourself.
PROPORTIONSDon't try to draw a person without knowing the basic proportions. If I see that you do this, and I see that you call it "art", I will hunt you down and kill you.
Listen to me: YOU CANNOT DRAW PEOPLE WITHOUT KNOWLEDGE OF PROPORTIONS.
Now, I'm not an expert on male proportions, but I can teach female proportions.
The head is the base for the entire figure. Generally, a female is about 4-6 heads tall.
The torso should be the same width as the head, with the shoulders extending out a little past the ears.
The abdomen and waist should be the same length as the torso.
The upper body is the length of the thighs and knees, which is also the length of the lower legs (not including ankles and feet).
If the figure were to be standing with its arms at its sides, then the elbows should reach the waist. The lower arms are the same length as the upper arms, and the hands are 1/2 the length of the upper arms.
Now, I want you people who are SERIOUS about learning this stuff to draw a woman (it doesn't have to be detailed, just so long as it isn't a stick figure and it has some show of curves) with this proportion guide in mind. I want you to scan it, post it here, and I'll tell you how badly you fail.
Then, we shall work on improving your knowledge of the human ANATOMY. YEAH.
CAN I GET SOME PEP, PEOPLE?
(((Ironically, I have no intention of becoming an art teacher. Music professor, yes, art teacher, no. But for now, for you, I will make an exception, even though you may roll your eyes or hate my methods.)))
This is what a finished sketch should look like if you use the proportion guide:

Okay, you know what, I messed up bad on the ankle. It looks like she's missing her ankle, basically, but ignore that. This is how the proportions show look if you follow the proportion guide.