The worst thing is that "pain between your legs." Do not let that continue! No, no, no. The way to fix it is to go to your local bike shop and tell them about it. Bike shops will usually let you try saddles and bring them back if they don't work. Saddles are a very individual thing. No one can recommend a particular saddle for someone else. That said, the Specialized series of saddles work for a lot of people. Terry Fly saddles are much used.
For the rest of it, just ride like you've been doing. 30 miles per day is quite a bit. You may need to eat a little something with carbohydrate and protein in it after each ride. Flavored yogurt is good. So is chocoalate milk. Not a lot, just a cup or glass. Vegetables are the standard good food for riding and weight loss.