AAAAAAAAAAAh $400.00 empty,little ass computer with a fan and shelf. How about NO!
Start your first grow in soil. Its easier,cheaper and if ya mess up ya have a chance to save them.
Go on craigslist and buy a hps light cheap. Make your own box or just hang the light in corner of room.
I put the screen on at about 30 days from seed after lst training. Screen sits about 18 to 20 inches from the top of pot. Once the screen is full go 12x12 and just let them tops grow. The whole idea is to get an even canopy.