Unfortunately, Bru'n Water is complicated enough to actually require a new user to READ THE INSTRUCTIONS. After a user understands the flow of inputs and outputs, most say its very intuitive. You may need to spend more than 30 seconds.
Adding gypsum for an IPA is a good idea, but you do need to assess what the ending concentrations are. If you don't add enough, the effect may be insignificant. If you add too much, it may be too drying and the beer pH may have been driven too low (also bad for hop perception).