Jaime, good for you for taking the steps to a healthier you! And being healthy before you get pregnant is an excellent idea, better for your and better for your babies!! So I applaud your decision.
I few of us belong to a thread called The Healthy Community, and most of us check in everyday or two, sometimes more than once a day!! Most of us joined sometime in January, it is a great place to get and offer support....if you would care to join us. There is a fairly diverse age spread, people from their 20s to their 50s. But when it comes to losing weight, we are all in the same boat no matter what our age, or how much weight we need to lose.
I would set yourself a short term goal. To tackle 125 pounds is a rather huge undertaking!! Why not try a bunch of short term goals, like to lose 20 pounds by the end of March....then set a new goal once you have reached that one!! This way you will feel you have had successes, and not always striving for that far in the future goal.
I hope you join us!