How much content before getting subscribers?


I have a question about customer subscription. So I’ve launched my blog recently. The topic is about the WEB 3.0 for investors and business owners. I wrote my first 3 long articles already and I also propose an audio version of my articles, plus a weekly curated newsletters for the paid subscribers.

Next months I will start to also propose free articles for the audience

My question is : how much content do I have to create to get people to join ?
How much content did any of you put out before you estimated that you could promote your blog and get people to subscribe ?
Am I asking the right question or thinking about this the wrong way ?

Thanks in advance.