One or two websites/platforms?

First book is in progress. I am already self-employed as a coach and have my own LLC and domain name (my business name, Sansu Rising, rather than my personal name)

My writing, however, is fiction. Strongly related to the work I do as an executive and leadership coach, and heavily (but not exclusively) autobiographical. So think more Venn diagram overlap between my fiction writing and my business, rather than subset of.

In terms of starting to plan ahead to publishing and platform, should I be thinking of doing everything under my existing business name, or be thinking of keeping things separate between my business name vs my author name E.g. if I go Indie I could publish under my business name (Sansu Rising), but would it be better to have the website be suemannauthor.com (for instance); or rather have it as subset of my existing website (www.sansurising.com)?