Welcome aboard - sounds like you did pretty much exactly what I did when I first started in this hobby. Best advice I can give you is to plan everything out ahead of time and force yourself to go as slow as possible. Al's advice on fish per inch is right on, although once your tank is mature - you'll find ways of tweaking that, like he said.
I would let your tank sit there with everything running while it continues to cycle - which will eventually remove the ammonia and nitrites from the water. Once you see they have dropped to zero and then find measurable amounts of nitrate, start doing water changes to slowly bring that number down. Using only RO/DI or distilled water will definitely help you in the long run keep the best quality water for your tank as possible. Tap and well water has so much extra stuff in there that it will generally always cause something ugly to happen down the road.
Back to the planning though... On the high end of the scale, you are looking at about 6" worth of fish while your tank matures. That is really going to limit you on the type of fish you can get as some can easily hit 8-12" for one fish. Figure out what kind of fish you like and research all of them. I have several books I look in as well as compare the "quick facts" on
Aquarium Fish: Tropical Freshwater Fish and Saltwater Fish for Home Aquariums to see the temperament and size of any fish I'm interested in. Add the fish to the tank in the order of least aggressive to most aggressive. By putting the most aggressive into the tank last, he'll be less likely to bully the other fish because he's technically "on their turf" in their eyes. However, I would try to stick with more peaceful fish in a 29g just to avoid the hassle of bullying and unneeded stress.
I'll stop there before this turns into a book, but definitely wanted to welcome you to the forums. Ask anything you can think of - we're always here to help