*nods and agrees with tkos*
Heh ok, with a little more info its a much clearer picture. No new fishies for you till the tank's bacterial colonies can handle em. Right now you are still in the first stages of the cycle (high ammonia). Adding new fish before ammonia and nitrites BOTH equal zero will most likely mean dead fish. Don't forget, new fish will add even MORE ammonia to the mix and your tank isn't ready to handle the ammonia levels now.
Yep. Water changes. Lots n lots. It will make the cycle go slower, as you are removing the food sources for the bacteria (diluting the ammonia and nitrites), but since those sources are deadly, better to have a slow cycle and live fish. The readings on your tests will dictate how frequent so keep checkin daily!
And yeah, you can pop in the plants now. Do keep in mind, they too may slow the cycle down a bit as they also use the nitrogenous waste as food and will be competing a little with the bacteria. At the same time, they are removing it from the water colum as tkos said, and it will make the water a safer place for the fish in there now.
Btw, you haven't added an ammonia converter like Amquel have you?