It is a question of practice and the settings of the pressure curve of your graphics tablet (or better, the curve in Krita in the tablet settings).
In CSP it is “so simple” to achieve these stroke endings because CSP uses post-processing for its strokes, which is not available in Krita. With Krita you have to be able to use your stylus, so you have to practice, which may sound boring at first, but once you get the hang of it, you should be able to draw such strokes in any software and without any of the technical tricks that CSP uses. I can only recommend you look at the topic linked below, and the other topic linked in this thread. There you will see that this is possible in Krita and you will also find hints, but we can’t do the practicing for you.
Your question is one of those that is relatively often asked here, so if you use the forum search, that is the magnifying-glass in the top right of every Krita-Artists-Forum page, you’ll probably find more topics like yours, key-words like tapering or shoelace are good search-terms, but I guess you’ll find more in the topics you discover.
Michelist