Breaking Into Wall Street Less than A Year Out of College! Please Help!

I graduated from Northeastern University this May (2018). I was a finance major with a 3.36 GPA. I have one internship that was a BO position at BBH and am currently working as a trading assistant (middle office). I'am looking to break into wall street (preferably an analyst role at an BB) even though I know my chances are low. Due to the fact that I have a Sub 3.5 GPA and i graduated from a non target school. I am considering doing the Wall street prep modeling program but its $500 so i want to make sure that this thing will actually help me secure a position. Also, i hear that networking is very important but I honestly don't know where to go or where to start. I am currently located in NYC and some advice about the WSP program, networking, and any other useful would be GREATLY appreciated!