Seeking Carrier Advice

I'm a second year student in a Tier 3 college in India, My branch is Mechanical but I'm interested in Programming. I want to become a backend developer and I'm stuck and confused on what tech stack I should choose, I am good with both Go and Rust but the job market seems to favor the MERN stack. I need advice on what I should learn for the current IT sector to get in as a backend developer