Honestly, once you're in, you can do whatever. The concentrations supposedly give you priority when you register for courses, but I have no idea how it works since they literally just open it and then everyone rushes over to ACORN at the same time. Maybe it puts you higher on the waiting list?
For ISD, the two programming courses are really, really simple. The idea is to just give you an idea of programming so that you can be literate, but not teach you Computer Science. I guess it would be like you teaching me Freud or Lacan for a couple of weeks, but that doesn't qualify me to do anything you can do.
Both courses are based on undergrad CS courses that you can actually audit now (or sneak into at least) - CSC108, and CSC343.
They turned CSC108 into a coursera course: https://www.coursera.org/learn/learn-to-program
And here is a sample CSC343 page:
You'll learn enough to know what programming is, or what a database is, but not enough to program... but that's not really a business analyst's job anyway.
The other ISD courses are meant to teach you the tools that businesses use to communicate ideas/problems with systems, which does have a tie in to KMIM as well. It's why I highly recommend 1341 regardless of your concentration.
I will say, this year there were TONS of Information Management/Analyst jobs in co-op and in the Government. I had zero luck with banks and law firms though, because my resume is probably worse than yours (former PhD here, so 9 years of grad school lol), but I had good luck with Government interviews at least. Your experience might be different, but also, the jobs available can be different as well. I know a lot of people who like the co-op experience, and a lot who don't. You also have to take a co-op class which means you lose at least one class from your schedule (and you lose the Summer and Fall terms if you do get a position). You also have to pay the school an extra 600 dollars per term as a co-op student (which is why they'll say that working at a Starbucks can be better if you're doing it for the money). I enjoyed the experience, because it forced me to apply for jobs, take interviews, and just think about preparing myself to work - things I haven't really had to do until now.
With ISD positions, you're probably competing against UofT CS majors looking for experience too, so that may be harder. There is a Data Science course offered every year that I would recommend taking as well, since I know someone who got an ISD job based on taking that course. But I think with KMIM and ARM, you should have at least a lot of opportunities - but there are only a handful of positions that are sourced for iSchool students only. Most of them will be open to anyone and everyone one, and you will probably be competing with UWO FIS students for a lot of positions.
(If you're young, the annual UNESCO position at Paris is a cool opportunity that is iSchool exclusive, so I would definitely apply to that if I were you lol)
I will say, and maybe this is just me, but if you aren't TOO busy, do take the time to sit in on a few other classes just to see what the other concentrations are about. You may find out that you really want to be a Librarian, and if you find that out in the first term, at least you can make a few adjustments going into the second term (also keep in mind that regardless of what you take, you will be an accredited Librarian when you graduate, so you could technically work in a library after...).