Alright, so Technomancers can jump directly into the matrix as is and at any time. So no need to roll for it ^^ and you can jump in as AR or VR (hot-sim) ^^ so if you go AR you can probably hold a conversation, VR, not so much lol.
Also, a Technomancer's Aura would look a lot like the matrix to a sensitive, so it would look like a swirling cloud of data, shapes, and images to some extent. Which change based on the individual, and thier current mental state ^^