How to design a newsfeed like Twitter using Firebase Firestore with JavaScript & Nodejs?

Hello peeps, I'm working on my personal project that involves building a newsfeed like Twitter. I have read some articles regarding the models used to design an effective newsfeed i.e push(fan-out-write) and pull(fan-out-read) model. Now, one of the recommendations is to join both together i.e hybrid. But my problem is I don't know how to go about it. The tech stack I'm using is Firebase firestore, JavaScript, Node and python with React as front-end. Anyone who has implemented it or knows any resource that could get me started would be appreciated. Thanks in advance