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What @Acliff said, I think - this is for fun, rather than for learning a skill that I need.
(For what it's worth, I'm happy* with my sharpening skills.)
(* When I say "happy", I mean the times that I haven't just spent 30 minutes making something that can't even cut warm butter.)
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I've done some forging 'courses' at the local smithy. Really fun to see what it take to forge the steel, hammer away, play with fire and get your hands dirty. If you end up with a knife you made yourself, that's pretty sweet. The sharpening course btw I also recommend, but that's a totally different thing. Although you'll be able to keep your diy knife sharp on a longer term (aka not ruining it with the wrong sharpening methods).
I'd say a knife sharpening class is more useful.
And something that you'll call upon, time and again.
Unless, of course, you want the experience of forging a knife.