Sure, I will do my best! First I’ll give you the advice everyone gives that sucks to hear but is totally true: just do it over and over and over again forever and you’ll get better.
Now a couple of things that are more specific/practical..
One thing that helps me is to freeze frame through videos of bodies doing things that are interesting and draw them. Having an idea of where a body just was and where it is going can help in a lot of ways; balance and fluidity and a sense of mass and weight. That idea of motion, even if you’re drawing someone standing still, makes them feel grounded and solid. I use reference (usually myself) when I’m having trouble and I also get into the pose I’m trying to draw to feel how it is, if that makes sense. Knowing in your bones where that weight is going helps.
Another thing is thinking in terms of silhouette (this is a design thing, I think, because I’m really a graphic designer). When I’m having trouble with a body I literally just try to think of it as a silhouette (this is much easier on the computer) - it’s easier to see where something is out of proportion or doesn’t feel right.
But speaking of proportion I also think it’s always best to exaggerate as much as possible. Especially when working from photo reference, things can get stiff. Photo reference is often indispensable, but without a base in life drawing (and even with one) you have to remind yourself that that extra oomph and emphasis and your visual language is what makes it interesting. And you’d be surprised how far you can take it before it feels wrong. Don’t worry too much about it looking “right”, perfect anatomy is really boring. You want to understand anatomy so that you can mess with it. You can always pull back.
Um, what else.. Always draw the feet!!! None of that cut off at the ankles stuff. Don’t draw on the computer. I mean, you can, but I think it’s easier to get better when you’re drawing with the tool that’s most closely connected to your brain (your hand) and then translate that to the computer later. Also digital drawings tend to look stiff because your hand can’t get as loose (well at least for me). If you’re working traditionally, try different mediums to find one that really sings for you. Draw through the body when you’re sketching, not just around the edges.
Drawing really fast helps to combat stiffness. My figure drawing classes in college were 30 second poses, lots of times. Most of the ink drawings I post I did 5 or 6 times before I got one I liked enough to upload. It’s like learning a fighting game - if you do it enough times it gets into your hands and then it’s there for good.
Hope at least some of this is helpful! I hope none of it was condescending either, since you are anonymous I don’t really know where you are at -_-; And thank you very much, I’m glad you like my stuff!