First timer! First baby! Have to lose 100lb

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Hello,
My name is Jazz, 27yrs.
I really need someone to keep me on track ,motivated and help with exercises.. I started gaining weight after I met my husband and we had our daughter..3yrs later I've gain 70lbs .. Its time too get the weight off..i weigh 245lb now and want to get back down too about 160-170.
Soo if anyone is out there in the someone is out there that can help...plz add me!