The addon has it's own tab in Thaumonomicon, where all the researches and recipes are located.
In order to unlock new researches some Vanilla Thaumcraft's researches must be unlocked, so do not forget to check this tab every now and then.
That is actually all you need to know about this addon in order to start playing, since all the recipes and their descriptions are located in the thaumonomicon's tab.
Open the spoiler below only in case if you want to know everything the addon currently adds:
-Some decorative blocks, including blocks from MC alpha
-A lot of alchemical recipes - from grinding wool into string to actually creating blaxe rods out of blaze powders. Tons of other usual 'macerator' recipes included.
-A way to get 12 shards out of 1 ore.
-5 new enchantments to recieve knowledge from fallen mobs, deal more damage to eldritch creatures, inflict taint poison on attacked enemies, gain more Aspect Orbs from killed enemies and gain Crystalized Essentia of slain mobs.
-A lot of plants, which literally allow you to farm resources. Iron nuggets, string, gold nuggets, void seeds, auram, sugar, lapis, redstone, knowledge fragments and even flux. Tons of them. Also, golden oak trees.
-Briar, a plant that can be used to make Rosehip Syrup to act like a stackable milk without buffs removal, and also affecting warp effects.
-Tobacco, tons of it to help a thaumaturge. Removing warp and summoning wisps included! Not a tobacco advertisement in any way! Smoking is bad!
-Better metal for your tools, armor and even shears.
-Better caps for your wands.
-2 new wand cores.
-Spikes, 3 types of them to kill enemies. Fake Player included.
-2 new sets of early-game armor.
-Entity Deconstructor, just a deconstruction table for mobs.
-Better(Faster) Alchemy Furnace
-Overchanting table to increase the levels of enchantments above their maximum(like Fortune IV).
-Crying Obsidian Obelisks to set your spawn point.
-A whole new Aura Nodes management system, which allows you to do anything you'd like with your nodes. Includes turning them to hunger nodes too!
-Sideway Arcane levitators, also can be rotated with the Wand
-Better anvils
-More void tools, like shears
-Different new trees!
-Some more misc features I am not going to list, since they are too small to mention. No mechanics changed, I promise!