@Dominic
Have you considered maybe using some pieces of the Kylo/Vader fan film? Like for eg. You mention in the opening crawl that Kylo Ren is trying to find this Fleet. So it could be some kind of His vision After touching Vaders helmet in which at the end he hears Vaders voice saying Mustafar or something. Then he knows where to go next. It could make His journey longer.

Are you planning to use some different ideas/pieces from other threads like for eg purple lightsaber or shots of Coruscant etc??

BTW, i cant wait to See your work 💪🏽 i m So hyped 😉