Try and read any of the basic books. But if you want a step to step procedure, try referencing Allen and Holberg's Book on CMOS Analog Circuit Design or Behzad Razavi's Book.
I would suggest you design a single pole circuit like a folded cascode. But if PSRR requirements are too stringent, then you have to go for a higher gain structure.
I think that i will begin with a folded cascode and i will study the books you tell me
Other question, for my Voltage regulator, i have to use an integrated capacitor for the compensation of the systeme due to the application of my chip. (I can't use any external capacitor), do you know a good error amplifier for this system??