Career advice for a really lost fresher

Hi guys,

This is my first time posting here, so I apologise in advance if I get the format wrong.

So I'm a first-year undergraduate currently studying at Oxford, I'm reading English Literature - not the most employable subject - and I'm looking for some advice in terms of breaking into investment banking, or just careers advice in general.

I've applied to some spring insight weeks (HSBC, Barclays, Rothchilds, and probably JP Morgan and Goldman's tomorrow) but know relatively little about the banking industry. I mostly applied because I felt that is it almost something expected of me - going to Oxford seems like a natural first step towards working in the city. I don't really dislike banking, but I'm just not quite sure what it entails. I have a rough notion that it involves setting up the capital with ventures who need it, stuff about IPOs and aqusitions, that it involves long hours and hard work, that the exit opputunities are what you are really going for. But I'd just be really grateful if someone could give me a crash course in i-banking and whether it suits me or not, and if I do want to get into banking how would I go about doing that, seeing that it is such a competitive field (perhaps places where I can swot up on the banking industry)

I guess what I look for in a job is financial stability, a "strong and stable" career path and a sense of fulfillment from the work. I don't mind so much the long hours in the first few years, as long as there is a forseeable end to it. Banking sounds like a pretty good fit, but as I said, I know nothing about banking.