well you will need a few basic things even with one plant
IMO (and there are many way`s to Rome)
grow a Auto (Auto is a strain of weed that will go in to flowering early at week 3-4 and finish in 60-80 days)
buy seed (buy good genetic, its wort it)
start in soil (easy and most forgiven for a new grower) remember to get the "right" soil for weed (do some research) and a 2-3 gallon pot with good drain holes, tho start it out in a Cup (much more easy to control watering)
need to choose a light, for a fist time grower CLFs or a small HPS light (150-250W) would be a good choice for one small plant (IMO start it out in the Cup`s with a single 55W CLF in 6500K and add a 250W HPS at week 3 once in the big pot) with that combo you could maybe also squeeze two plants in on a later point
need some kind of ventilation both to keep temperature down and to provide the plant with fresh air/co2 a and once it begin to smell a carbon filter (sorry it is a must)
a small budget 4 inch vent from Walmart would be ok for one plant and a 250W
no matter what you do need to make a little research, google it, there is many "guides" out there, you tube also have a lot of grow videos if your the lazy type
here is a link to a nice place to start:
http://www.420magazine.com/forums/frequently-asked-questions/83112-how-grow-cannabis-everything-you-need-know.html
a easy to use "guide" to look up a lot of stuff about grow aso.