55 Gallon planted tank.. with Goldfish?

Hi everyone, I have a 55 gallon which will be done in 2 weeks and I plan on getting fancy goldfish. I also really want a planted tank. I've seen it done before but how does one do it? Oh and please dont worry about weekly water changers and water quality :) I have a 125 gallon Discus tank so I'm pretty experienced with that. So, how would I maintain a planted goldfish tank? and what plants are reccomeneded?