Thank you! That's actually super helpful and it's nice to put voice to your username (good ghost story, btw). I'm just so glad you're using Clip Studio and not like some weird program I've never used before.
So first off, your stabilizing tool is lagging in a way that I don't see on my own computer, and it's probably part of why this is taking so long. Usually the response to drawing a line and it being formed is near instantaneous even with stabilization at 100, so it's a concern that it's really slow for you. It might be because of streaming, but if it's still happening without streaming, I would try to speed the program up.
One solution is to hide your rulers. It's a weird trick, but it usually works pretty good, also works good for photoshop slowdown and when using complicated brushes. I don't know why rulers are such an issue for all art programs but...they do. (and I felt you when clip crashed. Clip crashes a whole lot). Another solution is if you have a second drive on your computer that you can use to store that memory. I put my virtual memory on the D instead of C, that prevents as many crashes and it makes things go much faster. You can find it in the Performance tab under file/preferences .
You can also allocate more memory to Clip as a whole because I personally think they don't allow enough in the factory settings but youknow...be careful with doing that, you can only do what your computer will allow you to do. Either way, it shouldn't be lagging like that. Something's happened. Probably the streaming.
Drawing wise, I think you're in better shape than you realize. You do have talent man, you've worked real hard for it. The biggest problem I see is one that you acknowledged also in this video, that you have a tendency to redraw the same parts over and over only moving it a couple pixels to the left and right a lot before actually launching into the inking. It's a perfectionism thing. So consider the forest from the trees for a bit. That this will only ever be 940 px wide on tapas and I think 1080 on webtoon?
We get restricted on how large our comics get displayed and you're drawing at full zoom and like...10x bigger than that in 300 dpi. So don't worry about moving things a millipixel left and right, it will look virtually the same when you save for web. Remember this will only be like a hand's width wide on browser, and everyone reading on a phone sees it at like 3 inches wide unless they pinch and zoom. It's kind of the bane of digital art that we can zoom in soooo far when...no one can see those details once we finish. Your very nice careful work that you're doing, these strands of hair, these tiny notches near the neck, might not even show.
My teachers used to call this type of nitpicking "doodilating" your art, (which sounds kind of like a lewd term now that I think about it), but it's pushing paint around in the same tiny little spot instead of progressing forward towards finishing the figure as a whole, and so to get away from doodilating, it helps to zoom out as often as possible and see the whole piece--so you don't get sucked into details that again, are pretty, but are both not the focal point and are also kind of invisible at 72 dpi.
Since we're at a computer screen and can't literally step back, what I like to do which may help you as well is to have a zoomed out version in another window on a different screen so you can glance over and ask yourself--is this visible? and if it's not, ignore it and move on. You can go to Canvas/window/new window and it will open a second instance of the window you are working on, so that way you can just have one zoomed out and you can put that window wherever you want it on your screen (I like putting it on a second monitor). You can even tile the windows or maybe have it float so you can move it around. What you do in one window will now do to both windows. It's a neat tool that's kind of hidden and it helps a tonnnnnn to prevent not only mistakes but also noodilating. (You can even have the second window flipped so you don't have to worry about the horror of flipping your canvas ever again.)
Another thing is your technique for drawing the outer line thicker is neat, and I like the effect it gives, but you do it the hard way. It's not the wrong way, I just think it's way harder than how most people do it. You can simulate that thick outline when you get to your coloring phase, and I feel like you already do that anyway with your white outlines so...may as well do it with your black outlines, too. Just put an outline on a duplicate of the colorblocking layer and make it as thick as you want. Instant thick outline that is nice and clean and dandy. All you'd have to do is fix the sharp angles of the hair with another layer, if it's even noticeable at that size.
But honestly, your inking is good. It's clearly a strength for you, just slow right now. When you ink you're so much more confident than when you sketch--so maybe sketch less. The biggest thing is to fix that computer lag and to resist redrawing things that are invisible. You just gotta breathe in and relax, you got this, you're a good artist. I mean it.