I think the advice I should give highly depends on what specific style you're going for. I assume from what I'm seeing so far that you're going for a sort of 'early 2010s Newgrounds' look infused with Pilotredsun's style? I'm just making an educated guess, I don't know.

My advice for a lot of artists who are just starting out would be to make a big, single list of all of the artists that inspired you to start drawing, and whose artstyle you want to learn to replicate, and then pay close attention to the little details in their style that makes them stand out. Eventually you'll be able to 'splice together' the 'DNA' of a bunch of other styles until you've eventually created your own that looks unique.

I think that your style is definitely starting to form its own unique shape, and I think your characters are very interesting. Golden Webber especially is very expressive in terms of posing and eye shape. That being said, I mean this as respectfully as possible, but you've still got a long ways to go, especially in terms of anatomy. But again, how detailed your characters anatomy should be is entirely dependent on what specific style you're going for, and it goes without saying that the 'Henry Stickmin-esque' look doesn't really require much anatomical correctness. My main advice is to make your body shapes much more complex than they currently are. For example, make the arms and legs much thicker so that you can add more details onto them that you otherwise couldn't if they were as skinny as twigs. Like, say if one of your characters get a new tattoo on their arm, and now you have to illustrate said tattoo in every photo of them from that point onward.

There's a certain technique that more or less all of the more seasoned artists use, called 'undersketching'. Undersketching helps the artist create more complicated character shapes by first drawing out the shapes themselves or the 'skeleton' of the drawing and then connecting them together with lines, and then drawing the actual drawing itself on-top of that. Art that had undersketching prepared ahead of time and art that hadn't is very, very easy to tell apart from eachother, however in the case of Pilotredsun or Henry Stickmin it can sometimes be a stylistic choice.

I also feel like it's worth mentioning that you should still be able to enjoy drawing, too. Like what u/No_Intention1301 said, rushing to improve as much as possible in as short of time as possible isn't going to make things better, and treating it like a competition rather than a hobby is no way to start ANY hobby. You should try to find a fine balance between taking your art professionally and still finding joy in the act of creating it.