Which language should i use for store the test data?

I will create an mobile app for my capstone project. Firstly, we will implement an app and fix the phone on the wall like smart house systems.This app will measure seismic waves. After we measure the data, we will store and show with graphs etc. in a web app. Here is my question, We aren’t very good at this actually, how we can build this app, which language is best for us? Can it be done with just react and sql?