Hey! I have a 14 month old daughter and I am grossly out of shape! Need to shed atleast 20 kilos.. the only way I can motivate myself is to join a gym so I know I have to workout!

Was wondering if there are any reasonably priced gyms in/around victoria park, WA with a creche for my daughter? If not, any advice on how to shed the kilos. I've been walking to the shops (a 30 minute walk to and back), and doing zumba on dvds but nothing seems to be getting rid of the inches! So frustrated