How to break into IB?

**A little background on myself: **
Graduated with a bachelors in Finance in December of 2017. Had no banking internships throughout my undergrad years as my school wasn't a target IB school (Even though I graduated with a 3.86 GPA). After graduating I managed to land myself a spring internship at a boutique bank through networking efforts, however, that only lasted from January 2018-May 2018. I went on so many Banking interviews during my time there and after, however, I did not secure any offers. Most of the feedback I received was that the other candidates had more experience than I did, given that I was at the boutique for some months. So after failing time and time again, I decided to accept a Valuations role at a middle market firm in NYC to gain more experience with financial modeling and valuation.

I need advice on how to break into banking in NYC/how to approach recruiting and what type of banks to target. Also, any advice on when to start looking is also helpful. I feel that lateral hiring will give me no luck as I have less than a year of banking experience. I decided to study for my GMAT's in the meantime in case I can't break into banking now. Any advice would be helpful because I still want to pursue my passion, which is Banking. Thanks for the help!