I would learn free hand grinding, personally. The best way I've found was to start with wood. I know, crazy, right? But cut a batch of wood, and LEARN to get your bevels done right, even, and straight on both sides. Then use some cheap steal, even mild steel for that matter....cut a bunch of equal size pieces and REPEAT, REPEAT, REPEAT. That's a great way to learn to grind well. A jig is great....a file jig would also be a good starting point to understand the mechanics of what you are doing without ruining a bunch of steel. You can find an easy to duplicate filing jig on Gough Custom Knives on youtube.