I would start with the question: how much money do you have to spend and where is your room going to be located?
In your house? A rental? In the basement?
Growing weed (great weed) is all about climate control. Period, end of story there are plenty of strains that a neeb can grow that are quite easy if you simply have a pH and ppm meter.
People fuck around and spend sooooo much time and money trying to heat or cool their room with fans and ducting and timers and heaters and all manner of stuff.
If your serious about growing weed then you should be investing in a decent mini split.
A 24,000 but split will easy cool 5-6k watts plus dehu, ballasts or co2 burner. Then your climate control is ridiculously easy... set it and walk away. You will also be set up to use co2 when you have the cash ($500) and your smell will be easier to contain
No temperature swings, no freezing nights with stretching plants, no baked budds, and free dehu.
2k investmentioned will pay big dividends BIG