You do need to plan, but for 6 days, not 6 months in my humble opinion. Especially if you are just starting out. I see you just want enough for yourself, but plan for a few friends occassionally. Plus, you always seem to be running out. So here's what I would do if I wanted to avoid complication while maximizing the potential of the situation.

If you can get a clone that is by far the way to go. You could eliminate several steps this way, but you said from seed so here goes.

1) Get some good potting soil (not with ferts in it), some gallon size or less pots, 2 fluorescent lights that are supposed to have a 200 watt output but only take up 40 real watts (100 watters will be fine for the beginning, and a PH meter (about $25) and a small bottle each of PH up and down (until you know), and a cheap timer.
2) Keep the potting soil warm and moist. Flood it once with water only, that is adjusted to PH 6.8 or so. 2 or 3 tenths here or there won't matter, but don't get carried away.
3) Put a little hole in the middle of the pot, about 1/2" deep, drop the seed in and cover it up, packing it very gently. You may not have to water much or at all for a few weeks, depending. Keep the soil warm and moist.
4) When the seedling emerges (a few days to a few weeks), keep the light and the fertilizers away from it. Keep the light back for a couple days, and move it closer and closer each day until it is a few inches from the plant, which by that point should be big enough to experiment wich the closest possible distance. Lights on 18 hours. Keep the ferts out for at least to weeks, then 1/4 strength for a couple weeks, then 1/2, then full.
5) After a few weeks stop keeping the soil moist and let it dry almost completly out. Watch your plant carefully though. Then water with 1/4 strength hydroponic nutrients, even though you are using dirt. You will need 2 kinds of nutrients, veg now and bloom for later.
6) We are looking for females only, so after 6 or 7 weeks go to flower mode. Lights on 12 hours, flower nutrients.
7) Search this forum for any questions along the way, including how to tell the differnce between male and female. When you see a male immeadiatly kill it, or get it away from the others if you plan on wanting seeds at some point.
8) Keep lights as close as possible through the duration of the grow.
9) Search how to harvest and enjoy.
10) Keep one or two plants after harvest for revegging so you can keep a mother plant for clones (much more bettererish). Learn this. Live it.
12) Switch to hydro the amazing yet simple way... An Emily's Garden - type settup. Search this, its DWC type hydro which truely is amzing and simple. You will be astounded at the results compared to what you will be used to in soil.

And of course read and read and search and read.