X has been a witch for Y years.
Lots of Craft bios begin this way. Apparently we think that it sounds impressive.
No matter what your Y is, there's always a Y + 10 that would be more impressive. Not to mention Y + 20, or Y + 50.
Y years? Really? Is that all?
Besides, the statement automatically raises the question: So what were you before that?
And you've already lost your thrust.