Falling pregnant could take months (or years) regardless of your weight. As others have suggested you can still be trying to lose weight while you TTC. At 32 I wouldn't be waiting to hit a magical number that might be realistically very difficult for you to achieve. Look at other indicators of health such as blood pressure, general fitness, etc.
Plenty of healthy weight women have high risk pregnancies and plenty of overweight women have perfectly normal ones - it's just one factor.
A friend of mine who was quite overweight took 7-8 years to naturally conceive. She had lost some weight before conceiving so this can help TTC - she gained barely anything during her pregnancy and had a very healthy pregnancy and relatively easy, natural water birth without complication. Being overweight doesn't automatically mean you'll have a difficult pregnancy.
All the best for your journey!