Latent Technomancer, Is this viable? Options

[Witch]

I've recently started setting up a group for my very first Shadowrun game and have been reading up a bit more about the game on the fora. I'm planning to jumpstart my players with a slightly modified 'On the Run', followed by some more heavily modified versions of a number of older Missions and, eventually, Emergence. However, I'm afraid that getting acquainted with all the various worlds players interact with at the same time will be rather difficult for me as a GM. Due to a number of posts on this forum describing the problems with Technomancers, I decided that I'd ban Technomancers from my game at the start, in order to familiarize the entire group with the rest of the game first. However, one of my players seems rather invested in playing one, and I offered her to take the Latent Technomancer quality from Unwired.

What I wonder is, is it viable to start out as a Hacker and subsequently to become a Technomancer? The player isn't really a min-maxer, but I'd like her to be at least somewhat effective at what she does.