A couple of years ago I went to a professional corsetier for a fitting in foundation wear and I asked her if I should be in a corset and she told me that I most definitely need some kind of foundation wear for support, but a corset is way too restrictive.
Actually, to my pleasant surprise, I found wearing daily foundation wear once I became used to the support and the benefits that I actually found I am very comfortable being daily in a girdle and long line bra.
My recommendation is make sure you do go to a professional corsetier for a fitting. I found from her there is a right way to put on the girdle, and I had to learn to relax my stomach muscles. Once I could do that I found that I had a dramatic increase in energy and confidence and I liked how I look and feel. Now I am in foundation wear even when just relaxing around the house and it's great.