new to mfp

hello, my name is kylie, im 21. i have a 20 month old girl, living in nova scotia.
prepregnancy i was living at home going to school, i got pregnant right after graduation then 2 months after having my daughter i moved out with my husband [bf at the time] i guess from moving out on my own and buying our own food, i gained a tonne. i now weigh 200 on the dot [which is how much i weighed at my last dr appointment before having my daughter.
so i want to lose at least 25 lbs starting in the new year as we've been trying to have another baby and had 2 m/c's in 6 months,