That’s a good question! These things are always easier to explain through a tutorial or a visual aid, so I’ll have to work on one of those in the future.

But for now, here’s a smattering of things to try pose-wise:

Add a twist - Basically, make the hips and shoulders not face the same direction, we do this naturally whenever we walk or run. Having a twist adds a sense of motion to even a static character.

Place the hips and shoulders at opposing angles  - The ol’ contrapposto. If you go to an art museum you’ll basically see this used all over the place. It will immediately give them a better sense of weight, and it can make your characters exude all kinds of attitudes depending how you use it too!

Make them doing something - When I find I’ve drawn a boring pose, it’s usually just because the character has nothing to interact with. Give them a direction to move and something to look at/fiddle with and it will work wonders.

Put them off-balance and then try to correct it - I play a game with myself sometimes where I just start with drawing the lower half of the figure purposefully off-balance, and then I try to curve the upper body of the figure around to re-balance it. Sometimes it creates some wacky results, but you can learn a lot through experimenting. Start by just trying to draw a character in motion or with only one foot on the ground, then try to move the other limbs around to compensate!

Good luck and don’t let yourself get discouraged! Drawing isn’t something that comes all at once, so focus on small improvements every time.

I mostly have the double ended chisel/fine tip prismacolor markers. I have tried the brush tipped ones but I can’t manage to keep the colors from being splotchy, otherwise I like how easy they are to use!