Taking the average cow numbers is the best approach here, so input the cow numbers you plan to milk when all cows are calved.
Yes, you will still be able to use it. Although you will have no previous years data for comparison, it will still track your progress throughout the current year.
Yes, it does not matter when you calve as we will be tracking your own performance vs previous years. Just enter your peak cow numbers when all cows are milking.
Yes, just contact your Business Manager who will assist you. Your Business Manager will also have additional information available which may be able to help you improve milk solids production.