That is most definitely not the case where I'm from. You are born with magic. Then you can learn to use it properly or not, but you can't learn to have it nor do you decide how much power you have.
My originally inquiry inquired whether magical beings wanted to meet up with me, because obviously they hadn't found a solution and a different type of magic might help. No more no less. Whatever anyone inferred from that, it's on them and not me.
So there isn't a set pattern. Say everyone from earth, or everyone from a year? With the number of people here now, there can't be that many cases, so it might take months even years to see a true pattern. We should probably keep a record with as much information as possible. You never know when something might become useful.