I got a similar one about a year ago....looks like I paid quite a few extra $$ for a nice bamboo stand.
https://www.amazon.com/Sharp-Pebble-Sharpening-Waterstone-Whetstone/dp/B01FZZUL30?ref_=ast_sto_dp
After watching a bunch of tutorial vids & practicing (I had
zero sharpening skill), I've gotten better with it, but it takes a lot of practice and patience. If you're off by even a degree or two on some strokes, you'll round the edge somewhat. I finally got to where I can sharpen my 37 year old Henckels (wedding present) to easily slice paper if I'm careful.
But I wish I'd gotten the Spyderco like
@Nermal suggested (I was too cheap). Or better yet, one of these:
https://wasabi-knives.com/collections/wasabi-most-wanted/products/wasabi-ruixin-pro-knife-sharpener
I've thought about building a simple jig to slide my stone over a clamped blade on my workbench, to keep it at a constant angle, but never got around to it. Shouldn't be hard though. And I've learned that more important than a perfect 20 degree angle is a
consistently angled stroke. And one of these jigs makes sure even us less than perfectly coordinated people can repeat a stroke. Or with a Spyderco, you only have to worry about keeping the blade vertical, so it's easier than using a stone on a horizontal surface and guaging your angle.