Hi I understand your concern. For planning baby its not an issue with same blood group. But do have thalasemia check before your plan, just as a precaution.
Next Steps
Being overweight is a big issue for conceiving along with the lifestyle you follow. You can connect to any of us online or personally for customized diet plan suited best in your lifestyle and body type.
Health Tips
Till then you follow these steps
Have small n frequent meal a day. Reduce the amount of cereals, sweets, deep fried items, refined Sugars, maida products. Drink lots of water. Do a regular cardio like walk or jog or skipping etc for 5days a week 40 min each day.