Weight loss while pregnant

Hannah • Mommy of an angel baby, a handsome 2 year old, a beautiful 1 year old and pregnant with our surprise baby

So I'm 8 weeks pregnant and I'm 5"0 and 160 pounds. I have a lot of weight in my midsection and I want to lose weight so I'm as healthy as can be for my second lo. I had my son 6 months ago and I never lost the weight after. Does anybody have any good advice on what to do and what I can do while pregnant?