Where do authors hang out - FB or IG?

I’m starting a Virtual Assistant business for busy authors, where my mission is to take virtual time-consuming tasks off your plate, so that you can have a better work-life balance and do what only you can do. I’m trying to decide where to set up my first business social, but I need to know where my potential clients are hanging out!

--EDIT: I appreciate everyone reminding me that marketing on social media is usually ineffective, but I'd like to clarify that I'm not setting up a page so that maybe people can find me. This page will be so that if potential clients wish, they can see some of my content, or see that my business is still active, and basically just have a place to find me before I invest in a website. I do plan on go to in-person events and posting on the job board, but the purpose of those is different that the purpose of my page. Thank you!--

Since you’re all authors here, where do you spend more time/are more likely to look for a VA: Facebook, Instagram, or another platform?

I really appreciate your input!