Buy a magnifier or loupe so you can see the edge. It’s pretty much the best way to see if the bevel has been set properly for the length of the blade.

I have used a coticule for quite a while and found that it can get the edge to “shave ready”, but I need something to take it to really finished. Chromium Oxide on a paddle strop might be all you need to get it to that next step - and a good strop.