Ilkhan2016

Breath and Stormlight are both forms of Investiture. AFAIK you can power any of the magic systems from any form of Investiture. Zahel is on Roshar, I believe, primarily due to how easy Investiture (Stormlight) is to come across.

AFAIK the form of Investiture doesn't change anything about the abilities. For example, Szeth was sucked out of Stormlight when he drew Nightblood; and Azure used Stormlight to Awaken in Shadesmar.

/u/mistborn is that right?
Brandon Sanderson

A lot of this depends on the Investiture and the magic in question. Azure was legit using Breaths, for example--ones she'd brought with her. But Szeth was able to feed Stormlight to Nightblood, much as Vasher uses Stormlight to keep himself alive.

To Awaken with Stormlight, the easiest thing to do would be to first change Stormlight into Breaths--something that Azure doesn't know how to do. (Admittedly, Hoid doesn't either, so it's not like it's a simple thing to achieve.) You could also theoretically use some magical (or mechanical) means to power your Awakening with a different form of Investiture.