OMG we want to know more! How are things now with that story?
I also got boosted once, but not manually like you, the publication editor who published my story proposed it to Medium staff for a boost which got accepted.
I was so very excited because of that.
So far, I have not been able to write another such detailed and useful story, so I never got a boost again.
Umm, it is a technical story but I will still drop the link here: https://medium.com/code-like-a-girl/resources-and-roadmap-to-upgrade-as-a-java-developer-fcf7787cfbbc
Here's the one where I talk about it: https://medium.com/the-live-love-laugh-pub/we-are-boosted-on-medium-with-less-than-300-followers-bb283d13a48f
BTW, congratulations!