You have the right frame of mind and that is all I can say.
Ride that bike like a way of life. Learn how to spin and be efficient. Learn how to maintain it and keep it going. Be your own mechanic. Keep your machine going and use it in all walks of life. Before you know it you will simply be a cyclist and weight loss will not be a choice.
Your bicycle is your weapon, keep it clean, keep it true, keep it in the forefront of your new lift approach.