Please!
I am 6 months pp and still looking…chunky

I’m a size 10/12 and kind of out of of shape. Currently I walk and take a dance class a week and do yoga when I can, which is about once a week but sometimes once every two weeks.
I am going to a big wedding next October and I want to look really good! I’m 37 and fairly fit normally, but kind of lazy (it was easy for me to be fit without doing much in my twenties, but I’m not in my twenties anymore!). Normally a size six and would like to be a fit size six by then. Is it doable? What are your best tips?