Your recent sketches have some foreshortening. You'll want to practice foreshortening simpler geometrical shapes, cylinders are good for human limbs.
Just to press the difficulty of foreshortening - You pretty much always will want a subject, a real model you can adjust, especially while learning. We have 3D software now, it is very easy to pose a 3D model and work from there...
i want to get better at art
ive heard people say to study art you like but idk how really. just try to emulate it i guess?
I think there's a potential that you want to discuss art motivation. That is why I'm about to say what I'm typing.
Start with a joke. Art, when we first recognize meaning and to last moment, everyone will know how to criticize it with words and shit.
There's the usual origin theory that art is an evolutionary principle. More things means there is evolution. Fewer things is only possible through extinction. Animals have language, so they make art to communicate, as an alternative to the widely recognized thing, probably.
When it comes to drawing, there was always something like sand, which ancestors could use when their words were inflexible. Considering how words evolve and get destroyed, there is no replacement for a map that guarantees human readability.
Of course, some animals dance around and it didn't have to mean anything, but they came out stronger, more popular, and yeah, meaning evolved. Also sports.
emulate - if you like drawing in general, then the "student" philosophy is to learn from every single teacher. That means you emulate other artists as well as studying/practicing your own theories, or a feeling. Studying in this way you'll still think of the techniques, sometimes it's just a hand movement.
draw what you like - this is different, I mean if you like music you could draw with some music playing. You could study musicians and draw how they might stand.
You drew someone holding a sword on the 14th. If you look at a real life swordsman, you have a better example, you can observe the weight of the sword, and the movement of their clothes, and observe the steps they take with their feet, which tells you which way their leg is turned. You will gradually understand what the swordsman does, and potentially you apply that to some other weapon user. If that is what you want to think about, then it's a good starting point.
... got tired from writing bbl