Gorilla 2x2.5 or
gorilla lite 2x2.5. The original comes with extender which is good to have in the future,even if you’re not using now and may move to a more spacier place
4in fan/carbon filter from Amazon. Extra pre filter,. Few clip on fans or an tall oscillating fan,good soil and couple pot (smart pots/handles) and a good light as your Sun (I always recommend Hlg lights, (HLG100v 3000k for 2x2, you can’t lose for the price and quality of light, and your set.
oh,.And make sure you have a female seed 🤓
2'x2' or 2'x4' are the smallest ones you can get. You can do 1 plant in the 2'x2' comfortably and shove 3 plants in a 2'x4'. You'll probably want to do topping and/or low stress training to keep the plants small and canopy even.
Just start with a 4x4 tent or a 3x3. I chose a 4x4 as it's small, but still big enough to yield for myself decently.
It depends on how much room do you have, and how much of that space you want to occupy.