I have resolved to make this the year that I am truly going to do something about my weight and fitness. I have a goal set in mind that I would like to be able to go to horseback riding camp with my daughter this summer. I am currently around 260, and would like to have a goal of 200 by mid June. Realistic goal? I am really not sure what would be realistic

I am also going to start moving more. I would like to walk once a day for 30- minutes to get my heart pumping.
I am a mommy to 2 beautiful girls, ages 3 and 6. They are like their daddy and love me just like I am, but I need to do this for myself. I run an at home daycare center and have on average 6 children here a day. So I am continually around my own food, so need to have better choices around.
Do not want to overstay my first post, so will sign off but cannot wait to find out more about everyone else!
260/260/200 (first goal!)/175 final goal