It's a fine question to ask, don't worry. It would require someone who has skills at chemistry. You can find several youtube videos of such people attempting it, and it looks pretty haphazard in the sense that there's never really any point where they go "Aha, okay, 98% pure. Experiment complete." Nothing like that. So, personally I would not look into the route of making it yourself, unless you think your future involves some real devotion towards chemistry.