Well wheather you need ventilation or not depends o n lighting if you use HIDs which most and I will reccomend, If you use HIDs you will definatly need an exaust along with passive intakes.

I have a basic reflector (euro) with a 400w blv, HPS, I use a vents TT exaust fan, and I have five passive intakes I made out of flexible tubing to prevent light leaks. Some will say get an aircooled/cooltube reflector to hook up to your exaust, this isn't nessecery IMHO, I find having my exaust placed just above the light sucks the right amount of heat out and creates good airflow through the growroom. My temps stay at 21d-27d which is optimal.

That tent looks fine I'd just pick your own lighting system and soil mixes etc.

For feminized seeds you can go to potseeds.co.uk, Everyonedoesit.com, or .

Try a strain thats more indica for your first attempt, People recomended me mandala for a first shot because they're easy to grow not too tall, high yielders and very resistant to pests and mold.

Hope that helped