You pretty much are! There's a massive amount of documentation publicly available to Medium writers about Boost. Here are a few links:

https://blog.medium.com/how-can-i-get-boosted-33e743431419

https://help.medium.com/hc/en-us/articles/360006362473-Medium-s-Quality-Guidelines-How-real-humans-review-stories-for-Boost

https://medium-teamspace.notion.site/Medium-Curation-Manual-How-to-Assess-Story-Quality-01277bfcb0d94894b80f4aa1be76ade9

https://help.medium.com/hc/en-us/articles/360018677974-What-happens-to-your-post-when-you-publish-on-Medium

https://help.medium.com/hc/en-us/articles/23964242497559-Browse-100-publications-in-the-Boost-Nomination-Pilot