I have a list of 100K B2B Dataset. How should I use it to launch my new SAAS?

Hi there,
I'll start launch a new startup, Linesbox.

Linesbox is SAAS Application to manages the entire employee lifecycle in a single application.

The thing is – I’m no marketer and I have no clue on what I could say to the list of data. I've started a "Feature preview" series, but I have no idea what else I should say.
Do you have any tips or useful information about how I could create an interesting newsletter to prepare for the launch?

Do you have any tips or useful information about how I could create an interesting newsletter to prepare for the launch?
🙏 Thanks!