Do you get the option to do alchemy or do have to craft table for alchemy ?.

talk to the clerk blacksmith shop in aldyn that should give option use alchemy table

There are crafting tables, for example in the top right corner of the blacksmith in Aldlyn, which have to be used to craft things. Once you advanced Chiyo's events far enough, she'll get a skill for alchemy, which'll allow you to craft things everywhere in the world.