you intend synthesizing methamphetamine yourself so that you can rail phat and very potent lines.
This is highly admirable.
But bee so very carely with ammonia, without looking, the ppm (parts per million - thats how much knowledge i think you have) for fatality are very very low.
Anyway, I think your on the right track if you want meth quick, ammonia and the birch.
But bee careful, and simultaneously with searching for a ready made source look for synths to make this magic gas.
Look hard for the material the discovered synths demand as the source of ammonia or fail. It will probably be a fertiliser of some sort.
Work alone and don't ask for help. I'm telling you this specifically so you don't waste time.
you need ephedrine or pfed and a working synth for NH3, or ready made NH3 if you get ultra lucky, but don't set your plans around getting ultra lucky, start looking for an NH3 synth, understand?