At the end of the day, just draw anything that captures your interest and do what works best for you that'll help you improve. Like I took a Life Drawing course roughly 5 years ago. It was one of the best things that helped me broaden my eyes as an artist and I learned a crap ton. You have to sketch live nude models in a variety of different pose positions in every angle. One of the best techniques you have to learn is the Gesture which are quick, not very detailed, expression drawings to get the feel of the action of what you observe. There were countless times when I missed an action because I couldn't react fast enough because this is real life and being able to capture it perfectly takes a very long time until you're good at it. This is why Gesture drawings are important because they help loosen you up and trains you the more you do it. There's also the lay in which is something that animators use. You roughly sketch lightly a simple representation of the entire human body in simple shapes. The idea you'll gradually build the human figure adding the extra details later on with softer drawing pencils. But yeah, eventually the more you do it, you'll find your own style and go with it. xP Of course, what Timid Giant Art said is true. The internet is a great resource. Find anatomy resources anything that'll help you improve. If there's an artist's style you obsess over get references of it as much information to help train your muscle memory and try to get a feel for his/her style. Though, still it's better to go out in the real world and draw from life if you can. Or if you can afford to take a Life Drawing class I highly recommend it.

https://youtu.be/cDz9X2X3MTc been listening to this song a while, love it.