I'm your height and also need to lose weight. I definitely notice the difference now that I weigh 50 pounds more than I should. I've always used men's skis due to the size thing. But women's boots due to the weight thing.
It is really crucial to find a good bootfitter, not the "right shop", the right person, and make an appointment. You want them to spend time with you, not be rushed. Best time of the year is NOW, while the inventory is high and before the crowds hit. I can't help you with a name, because I'm not anywhere near Montreal. Read up on fitting before you go, even if it's to a recommended bootfitter, because most of the skiers out there don't know a good bootfitter from a bad one. So, word of mouth is just an indicator. It's your foot, and if you've spent some time reading up on the boot fitting process, you'll be better informed to walk out in spite of recommendations.
And remember, you're not walking in these boots, so you don't need room for the sole to bend. Your foot needs to be IMMOBILIZED because it's the primary tool you have for controlling the ski. If your heel or the wide part of the foot is shifting around, you're not controlling the ski. In addition, that lining is going to pack. In every direction. So, you want the boot after ten days to still be snug. And still snug after twenty days. Because liners aren't cheap. So, you're going to be going through some days not entirely in love with your boots. We don't want you black and blue or losing toenails, but we don't want you perfectly happy standing around in them at the bar later, either. SNUG. REALLY SNUG is the goal.
As for skis, stay away from noodles, but beyond that I have no recommendations, because it's a personal thing and most skis out there are good for someone. Just make sure the person recommending something is either an expert demoer or is shaped like you. I ski with women tinier than I and none of them like what I like.