I could say to you that it is a chance to avert the damnation of your very soul, a way to properly gain a grasp on the ravenous waves as they crash against your inner bulwark. A way to at least lessen the chance of horrid mutation that often claims those who end up delving too deep in their most vivid moments of desperation. Were I one of my more brutal colleagues I would say you have no choice in the matter. Or at the very least the choice would rest between organizing a trial or escorting you to the nearest Collegiate property.
But as you've probably guessed by now, I am not. Instead, I am the principled fool who would rather shoot a wealth merchant for condemning an innocent woman and would give anyone the benefit of a trial if given the chance.
Since we are talking in hypotheticals- maybes, instead. Let me give the both of you a lesson on the obligations and advantages that come with Collegiate membership. Aside from offering a Wyrd the chance at proper training of their talents, a Collegiate apprenticeship allows for them to explore the kinds of magic that they are most in touch with. Whether that be throwing fireballs, aiding the sick and wounded with healing hands or quiet literally sinking into the shadows to track their pray. It is a chance at tutorship by someone who understands the magic that suits you.
In doing so it also allows the prospective apprentice to practice their art in a safe-ish environment with peers at their side. Not merely increasing in skill over the years but also in their ability to control their talents. And to be better prepared for the consequences one might face should something go wrong. I won't profess to know how exactly the Colleges train their initiates, nor will I deny that any who join will have to abide and live by strict rules during their careers. Yet there are none other who can offer what they do.
At the end of their apprenticeship they would receive a license of sorts and be allowed to travel the Empire as a journeyman. A way of passage and a chance a plying their skills in the wider world, a guild membership if you would. The license, whatever form it might take, is a token of legitimacy in a way few things are. And a magister can expect to receive accommodation, benefits, respect, and fair treatment, as would befit any noble of Sigmar's Holy Empire, while in the employ of the Electors of Sigmar's Holy Empire.
Some go on to join the army. Others simply seclude themselves away in research, either alone or with their fellows. Or make pacts with local villages, wealth merchants or a noble families and advice them on matters magical or work on commission. Others still simply travel the roads of the Old World and heed the call of adventure, doing their own part in protecting the Empire and its people. Be it isolated townships with no one else to turn to or bustling towns unaware of the dangers hiding in its sewers. As long no proper war or dark enemies besiege the realm, a magister's agreement of employment or lack thereof are his own.
Whatever it may be that you seek, with this mystic now, possibly journeyman Terrell before, and maybe others before them. Understanding, calling, peers, safety, might or control. Or maybe even the chance at spreading such teaching to another who also finds themselves in your position. Joining the Colleges could provide you with it.
This could be your chance to follow the road east, as Sigmar once did.