How best to start this website

I have a good keyword domain where I want to make money from referring people to sign up offers in the niche.

What's the recommended way to set this up? Traditionally I'd write a blog and document every offer, post on social etc and slowly increase traffic.

What would you do in these circumstances to put each offer in the visitor's face quicker and therefore leading to more conversions?

Validate an idea

I'm currently building a SaaS product, it's just me working on it, and its been a long process.
I need to generate revenue and created an Instagram account to find clients that need web & graphic services, I'm thinking of making it a recurring monthly package that costs about 100$ monthly.
Is this a valid idea path?