I'll 2nd the strop (leather on wood) + sandpaper method.
Very, very simple to get the hang of it, especially when starting with a new knife (with a presumably decent edge). Just like stropping, using edge-trailing strokes, but done with a grit choice to suit the needs of your edge. If you haven't stropped before, you might practice with any similarly sized blade (doesn't even have to be convex to begin with, but if it is, so much the better). Start very light, with something like 1000 grit. That'll be aggressive enough to see the results of your effort quickly, without being too aggressive and overdoing it. Use light pressure, as if you were wiping some peanut butter from the edge of your knife, onto a paper towel. No heavier than that. Take a close look at the edge after every 3-5 passes, see how it's changing. Test the edge by cutting some paper or something similar. To avoid rounding the edge, keep the angle as low as possible, and the pressure light.
If you really do want to continue using your crock sticks, the sandpaper could also be wrapped around those, if you find the normal grit of the ceramic to be too fine to get the job done. At least that way, you're still using the method/technique that's comfortable for you, but with a coarser grit. Same fundamentals apply: light pressure and maintain consistent angle. With the sandpaper in particular, light pressure is essential, so you won't cut the paper with an edge-leading stroke.
Good luck.
