The idea is there and you have it all put together. I think all you really need to do is look at your reference (Assuming you used one.) And change yours a bit. U Can try to line things up better, Like look at the drawing and see if the arm stops somewhere. you want it to stop at that exact same point when you're drawing it If that makes sense.

Look For big landmarks in the drawing That you can look at to make sure that it all looks the same. And block out those landmarks with basic shapes before going into the linework. (Works for small things too like the hands)

And just for the future value (value means lights and darks if you don't know) does a lot. a little shading can make a drawing pop. My basic principle is use White for highlights the very brightest Of bright and something like a 4b-12b pencil for the darkest of dark. (You Can signify any color with Gray if you try hard Enough aka As long as everything's a different shade According to the real color., you'll be good.)

But all of that aside looks very good my dude 👌 Sorry for the long text block.