His father, yes the Sociopath ordered him to continue with his lessons once he was able to walk around properly.
Being treated like a child and having his freedom taken away irritated him to no end and brought up some bad memories from his own childhood.
Thankfully he was a child and the only thing he needed to learn right now some lessons from Maester Wolkan and then some lessons on courtesy and manners from his sociopath father who by the way still kept prisoners in the dungeons under the castle whom he flays at his leisure time.
What a fucked up family.
But he didn't have a wand and couldn't use advanced magic like Obliviation or Imperio to get what he want.
Thank the gods he was still able to cast some compulsion charms wandlessly or he would be totally helpless in this new and unknown world.
So he followed his father's orders and attended Maester Wolkan's lessons like was expected from him. Except that instead of learning his lessons, he gathered more knowledge about the world and his current situation.
'The North', which he now knew was the largest kingdom in Westeros, was much like the Russia.
It was cold, had few people living in it and had never been conquered by an outside army except for the dragons.
The people in the Kingdom followed the Old Gods (whatever that meant) and thought the Old Gods watch over them with the help of Weirwood trees (whatever that was).
But regardless of his scepticism about gods, he was quite interested in the magical Weirwood tree. And thankfully, there was one such tree in the Castle.
And that was how he got his first magical wand.
A simple 8 inch wand made up of a Weirwood branch with a core of his blood.
It was not very powerful or very accurate. In fact, it was by far the weakest wand he had ever used in his life and he held no delusions that he would be able to cast any of his powerful spells with it. But it was a wand. It worked. And a whole new world of possibilities were open to him because of it.
Now he'll just have to be sure to not cast magic in front of others. People in these medieval times were superstitious and might try to burn him on a stake. Not that they'll succeed but such a thing would definitely annoy him.
Plus, when he went to the magical tree, he found out that it was releasing a good amount of ambient magic in the atmosphere and he knew he would be planting more of such trees in his backyard if it was the last thing he did.