Don't feel rushed with adding the live plants, you have plenty of time to add to your tank and change it over time until you get everything just right.. if that is even possible, lol. It seems like every week I think of something that I want to change or add with one of my tanks, the possibilities are endless!
Regarding your cycling, if you were testing your water closely (twice a day is good, like you were doing) and you could observe your ammonia levels rising at first, and then eventually starting to drop and be converted into nitrites, causing a nitrite spike, and then ultimately being left with nitrates, I would say your cycle is going along nicely. The only thing to be careful of is to make sure you continue giving your bacteria an ammonia source until you get some fish in there to do it for you, otherwise your bacteria colony will die off and you'll put some fish in there and wonder why your ammonia levels have spiked and your water is white and cloudy. The only other thing I would suggest is to make sure you add fish slowly and give your bacterial colony time to catch up and become big enough to handle the bioload that you are ultimately planning on having in your tank.
Good luck! Any more questions, feel free to ask.
