Welcome to ponding.
First thing I would recommend you do is find out the chemical composition of your pond....it is important to know the ph and total alkalinity. Local county ext. services can provide testing and also recommendations based on results if any are needed. If it ain't broke, don't fix it!
Tractor Supply here sells two types of fish food: one is called "Trophy Fish" by Sportsman's choice and is an excellent product. It comes in convenient 25 pound bags and has 36% protein and min 4% fat. The other product is lower quality catfish food that generally comes in 40 to 50 pound bags. Ask your local TSC store manager to stock the "Trophy Fish" and you will be very happy with it.
Be careful to avoid adding unnecessary waste into your pond. Make sure the fish consume everything...and don't overfeed. Excess feeding causes many problems in small ponds.
The growth rate of your bass will depend on forage availability and water quality and to a much lesser extent genetics. I've raised bass to two pounds in that first year, but one pound is more normal and expected.
A really excellent monitoring technique involves measuring the relative weights and tracking that as time moves forward. There are several publications which explain this: http://www.aces.edu/pubs/docs/A/ANR-1193/ANR-1193.pdf
I have found it to be a really excellent tool to monitor fish status and a great indicator of when changes need to be made. Personally, I prefer it over any other approach I've found, including electro shocking.
Good luck with your new pond. It can provide generations and generations of fun for very little effort.