LOL yeah, in a matter of no time at all you're language will be spiced with all the words that would make a criminal blush.
BMQ isn't easy, unless you luck out and have instructors that are easy going, but even then it's pretty rough.
A few pieces of advice :
Don't go in there thinking you know it all. Especially about physical fitness. I've seen countless big mouths who thought they were in amazing shape get the shit rocked out of them by 45 year old instructors who could do an ironman in their sleep. Matter of fact, don't brag about how fit you are at all. No one really cares but your self. By the way, make sure your shoe laces are double knotted on the PT Express, because it's a really sad reason to be put on WFT, which I've seen personally happen to too many people.
Don't knock the WFT (what used to be RFT) guys and girls. See above statement. If you land on PAT you will be part of it (from what I've heard unless it's changed again).
Take all your personal things you think you may want. Laptops, books, cellphones, Sony PSP, whatever. My BMQ had their things on week 4 and were able to have them after work all the time, but each course is different. Be prepared, some courses never get their goodies back for a while. Some get them back really soon.
The heat and humidity are killers in St Jean. Drink LOTS of water and eat healthy. Gastroenteritis and all sorts of other wonders float around St Jean. Its a huge petri dish full of disease. That leads to this : If you hurt go to the MIR. I will tell you now that no one there gives a flying crap about your health except YOU. You only have 1 body, take well care of it.
When you know you're getting issued kit, ensure that you put on some crappy civvie clothes because your duds will become stained, stinking and may have to be thrown out. Matter of fact, don't wear anything to high class or gangsta, I'd suggest a pair of light fabric slacks (or shorts of the same fabric) and a short sleeved polo shirt.
Mentioning kit, ENSURE that your combat boots and all weather Goretex boots (herein after described as the CF98 specials) fit properly. Not too tight and not too loose. The regular combat boots stretch...the goretex not so much. If you know that you're going to be active that day, ensure to wear the most comfortable boots (most find the regular combats best).
Don't try retarded shortcuts or scams to try to pull 1 over on the instructors. They know better (for the most part).
My last piece of advice is this : Don't think, just DO. Turn the mind off and just act and react, that is basically all they want to see. Excuses don't exist, not much else does either. Just think that you're the slave of some non caring robot entity and you'll be fine.