The best advice I can give is study as many grow journals as possible. When I first started reading up on growing I would read 15-20 journals a night. I also had a pad of paper next to the computer taking notes. Its amazing how much I have reffered back to my little grow guide I created for myself. Being a stoner this really helped remember what I have learned.
I would start more than one plant. You can always cull out the weaker plants when it comes flower time. I started with three plants all turned out to be female. But I only have room to flower one plant it was nice to have three females to choose from because one of the three was a stronger Phenotype.
This was my first grow and it was a learning experience. I love every second of it.
Good luck
