To the OP,
I'm in the same boat as you. I finished my application, and have completed the force fit training for the SALH in Medicine Hat. Eventually being trained as a Crewman, they are a Armored Reconicense Unit, part of the 41 Brigade Group. I am currently employed as a Medevac Pilot in Medicine Hat working week on week off schedule. I'm not really sure what to expect either.
I think one thing that hasn't been mentioned, is to be open about it with your employer. I'm lucky because mine is ex Reg Force he's been supportive.
In my interview with the Sergeant Major, he mentioned they weren't interested in messing with my full time job either. As earlier stated the Reserves doesn't pay well. But they do want to see commitment.
If anyone wants to share some experiences from Basic, and BMQ Land I'd be interested in hearing.
I'm currently a Recce Crewman with the BCR, I've been in 5 years. Some of the best experiences of my life by far, and more than likely the reason things have turned out so well for me civvie side as well. The skills and life lessons I picked up have stuck with me since the day I walked in the doors newly sworn in and got roasted for being an idiot. As for BMQ and BMQ-L, BMQ isn't difficult as long as you work as a team and pay attention to the points the course staff is trying to get across. Especially when it seems like they're beasting you for no good reason. BMQ-L is more of the same, but the lessons being learned are more combat oriented and could save your life if you ever end up in the fight. The Crewman course has been condensed at least once since I did it, but is still a good go.
All in all, the best decision I've ever made and when the time comes to hang up the boots, it will be a sad day for me.
If you have more questions I'd be happy to answer them via PM