Trending @Accenture; Career switch from Data engineer tester

I have 1.5yrs experience as an ETL tester in Accenture. I wanted to switch career as a developer and confused to which path to choose.

I worked as an Nodejs intern for almost 6 months before joining accenture. So I am totally confused whether to continue as a data engineer and learn python to switch to a developer role in other company or learn React and switch to MERN.

And confused which would be good for future demand. Please suggest your opinions.