If i were in your situation, I’d try something different. Forget about calories. Try to find “tricks” to force yourself to eat less without measuring. For instance, eat two big meals a day only. Fast from 6-7pm til 11-12 next day. Don’t drink sugar in any form (including milk), don’t eat cheap calories. But allow yourself to eat all the rest and anything you want as long is high quality food.
And for biking I would do mostly LT1 for now. I can’t imagine the stress of wanting to fuel a demanding workout with sugar while trying to lose 10%+ of body weight.
Good luck