Your post didn't make much sense to me...

Yield is hard to estimate because there are a lot of factors that can influence it. Since I would assume its your first grow, don't expect too much.

As far as seeds, I got mine from SensibleSeeds.com. They were very fast and discreet and I would recommend them to anyone. As far as strain, its really up to you. I'm currently growing Master Kush and it has been great.

Good luck!