Here are the numbers, is this worth doing? Looking for advice on starting a niche blog.

I'm not familiar with the economics of blog/content businesses, but I was testing a niche via a Facebook ad and a Coming Soon landing page. I was hoping someone would be able to tell me if this is something that might be worth pursuing.

Below are the current numbers, but I'm going to continue running things for another 5 days.

Facebook Ad (I created one basic and broad Facebook ad and ran it for 5 days.)
CPC: $0.47
CTR: 1.97
CPM: $9.28
Amount spent: $50.94
Link Clicks: 108

Landing Page (Just a basic coming soon page with email capture.)
Emails collected: 6

It seems like I could build an email list and acquire new contacts for less than $10/email. I'm not exactly sure if this is good or not but it seems alright. Then again I don't know what the LTV of each reader would be.

I'm looking to create a website like The Spruce (https://www.thespruce.com/) but in a different niche.

Any advice would be great! And let me know if there's anything else I should do to test the market before diving in.

Thanks!