I did my first full refret recently, Superficial. I did a guitar that was almost worthless so had nothing beyond a bag of frets to lose.
I recommend doing the same. I got better at getting the old frets out as I went along. I started at 20 on the basis I never use it. One really didn’t want to come out, it eventually yielded to heat, bending the neck back and brute force but a good few wood chips came with it.
I got better at pre-shaping the frets. I was lucky with the first two then had two attempts at the third by which time it needed glue to hold it tight. I worked out they needed slightly over bending and inserting with a tool with a radius very slightly tighter than the neck then a final tap down with a copper hammer.
When I sanded the finger board I wasn’t careful enough to avoid a very slight round at the edge which required a bit of Araldite to fill later. It’s not easy to remove over 1mm in places, get the right radius and never angle the block beyond the radius required.
I’m delighted with my first attempt but know the second will be better. A pro who has done hundreds would hopefully do better.