yup, sound advice, Thermometers are a must, one with temperature (C or F) and RH. Even better are the ones with the external probes, you can put the display outside the area with the probes inside. So no constant opening of the area to see temps.
A single probe moisture reader is also a very handy thing to have, no need to lift plants to check if they need watering, just slide this probe in from the top (if you use normal pots) or from the sides (if you have airpots) and read the display
ive been using mine for years now, never had a under/over watering problem since.
LEDs are perfect for small areas, so bang on with that advice too.
Ordering seeds for you bro wont be a problem, Humboldt are in Northern California and have really good solid strains that yield very nicely,. plus they also have association with the music side, ie, Dedoverde Haze Auto is Cyprus hills favourite strain, Chronic - Dr Dre. etc.. etc.. so, yeah, top pedigree strainers bro.
And best advice is, come on here, lots of help lots of info and lots of journals to study over.
Best of luck with it dude, the first grow is always the most exciting but can be the most stressful
best thing to always think is,,,,its just a weed man. lol. hard as nails like nettles.