Nothing, which is exactly what it will do. You just need to let your tank cycle.
Never heard of that fish food before, but here's an easy way to figure it out. Look at the label.
Ingredents are listed by what is the most in the product. Example, if fish is the first thing listed (as it should be) there is more fish than anything else in the food. If the first thing is soy of flour, well, get another food. Remember, bettas are meat eaters.
Also, it should be high in protein. minimum 40% is a good rule of thumb.
It doesn't say on your icon where you are from, but here we recommend either Omega One or New life Spectrum.