I do work with a lot of controls, it's still electrical, I have my instrumentation as well which really helps. It would be something to focus on more after you get your Jman. Controls isn't really a technical designation, just kind of another aspect of the trade I guess, a very broad aspect. It's very interesting, but can be complex which can make a person very desirable in the workforce.
I'll try my best to explain simply. In the industrial world there are industrial computers that control complex processes to produce a product. These computers need many wires that interact with field devices some are simple transmitters, limit/level switches, motor contactors (switch that turns a motor on/off) and control valves, some more complex examples would be frequency drives, (precisely controls the speed of a motor) or analyzers. Basically your job would be to make sure all these devices are working properly and interacting properly with a DCS or PLC (industrial computer). In this instance you rarely cary anything heavier than a multimeter and a screw driver. If you are very intelligent you may end up developing the logic for the process within the computer, but that would be a long ways in the future. There are many spinoffs from these examples as well. Hopefully that was simple enough.
Personally I work with a lot of large frequency drives (controls speed of a motor) and PLC's (smaller more localized industrial computer) lot's of time spent staring at a laptop confused haha. I still really enjoy getting on the tools and getting a little exercise for a few days though.
My advice is get in anywhere you can, that can be one of the toughest steps, then as a first or second year apprentice get into industrial construction and see where it takes you. Industrial construction will give you the best shot at not working winters and will be the only industrial job you will get as an apprentice. The first few years will suck balls, you will have to work hard and do the shittiest jobs and it can be very physically demanding. As you get close to your ticket it gets easier and you may see that it was really worth it, just remember to ask lots of questions and work hard. You'll probably never send it to the moon in terms of income but you'll have a career that is ever evolving rarely gets boring and can have many facets to explore.