Building a Database for a web application - brand new

Hi There,

I am currently going through this playlist on YouTube Intro to MongoDB Atlas in 10 mins | Jumpstart - YouTube

I want to know if this would be relevant for the application I want to build.

its a very simple searchable database which will need to be relational - just want to make sure I’m on the right track.

all my data is basic and in excel for now - any guidance would be much appreciated.