I have both straight edged and curved edge/sweep wood carving tools. I can think of 1/2 dozen different "methods" which all come together with the one, single result.
Every one of them needs to be learned. My advice is to pick one: sandpapers, diamond plates, water stones, etc and figure it out.
Me? I was taught freehand sharpening. All the unwritten tricks as well. I have done a lot of repairs and tune-ups for other people, even a carving tool vendor.
There's no such thing as "expert." I am competent to tackle just about any edge.