There’s a few ways to approach this. You can get some roughing done with saws (band saw/table saw) if you jig it up properly.
As manual as it sounds, I would highly suggest moving over to a rasp and doing a lot by hand. Not only is it satisfying to do a lot of it by hand, but the shape if it really is nice to tune by feel. I love how my neck feels and I would have never been able to do that in CAD.