Is it good enough to opt for a Bank SO after IIM?

I graduated from an old IIM where I wanted to work in the finance domain. But I am stuck in an IT job where I am not even using my teachings of MBA and it is a job equivalent to a BTech Grad (Oracle EPM). For this reason I thought of opting for Bank SO. Planning to do it for 3-4 years which will set my career in core finance and help me switch to a different and strong finance job in future. But I am having doubts as it will be tough to handle my education loan. Where I would be earning half what I am getting here in my post IIM job. (Will be getting 60k pm in my SO whereas I am earning 1.2L pm currently in a toxic environment and in a state where I don't understand the language)