Just wondering.... can we eat anything during pregnancy first that can help with breastmilk supply? Clueless first time mom here.... :)

You can try adopting a low glycemic diet that high in natural fats and proteins. Avoid or cut down on processed and artificial sugars and refined flour-containing foods (which is difficult as these are mainstays in most foods found in stores). My friend cleaned up her diet from processed and artificial sugars and ate clean in the last 3 months of her pregnancy. Compared to her first pregnancy, she claims that her milk supply is better the second time round.