Stepping Stone to IBD?

Never posted on here before although I've been reading posts for a while. I thought I'd pose my question to see what you all think/get feedback.

My question: what is the best way to break into IB if you've completed ugrad and work in a mostly unrelated finance field?

Some background:
So I am currently trying to break into IB in Canada/Toronto. I missed the boat on getting an IB analyst role at a big5 right out of ugrad and instead took a job at an insurance co. From what I gather my last shot at getting back into IB is the Associate recruitment phase that takes place upon completion of grad school MBA.

I'm just about to come up on my 2nd year mark of working here and unfortunately its hitting me that 1) what im doing is mostly unrelated to IB (mostly policy/regulatory work, maybe about 5-10% of my job is analyzing and auditing credits) and 2) that makes it increasingly hard to break into IB as time goes on.

I would like to go to Grad school this Sept and, with strong gmat scores, hopefully get into Ivey/Rotman or a better school in the US. Then using strong scores/marks, leverage summer internships and eventually an Associate offer from a big5 after grad school is done.

So is that unrealistic? seeing as what I'm doing now is very unrelated to IB, is it unrealistic to expect good marks and good school to get me a summer internship and then Associate offer? Would delaying grad school and getting a second, more IB-related job be beneficial?

Any comments/concerns are much appreciated.