Welcome, Maddy! (may I call you that?)
You sound JUST like me...eerily so, in fact. I too am a housewife / student, and I too am here because I want to have the energy to live my life better, enjoy my 20-month-old DD, and just have more self-confidence than I currently do. Alas, unlike you, though, I am OBESE.
I'm studying to be a dietitian (!), so this is about my credibility. My professors haven't outright said I need to lighten up (literally) but I can sense their discomfort that one of the students in their Dietetics program is OVERWEIGHT!
I've also been told quite bluntly (by seniors and fellow students) that if I don't lose weight by the time I graduate, I'm going to have a hard time finding a job because who wants to hire an obese dietitian to counsel patients on proper nutrition?