Most seeds these days are capable of producing amazing plants. Your yield depends on so many things, from the size of your containers, the grow method itself, your nutes, your lights... and then with all that, everything needs to go just right, with no hiccups, for at least 4-5 months to produce prize winning pot. This is not easy to do, and certainly not every time, even by the most capable of gardeners. If I am having a so-so grow, I will get 3-5 oz dry from each plant, or less... but if everything goes right my personal record with my equipment is 8 or so. Each grow ends up being the sum total of everything that happened during that plant's life, the good and the bad. Good seeds are just as susceptible to the skills of the gardener as are mediocre seeds and given the genetics available today, every seed is capable of growing into amazing pot in the right hands and with the right conditions.
Order easy to grow seeds at first, and see how you do. You should be able to exceed dispensary quality in a well equipped home garden with all of the seeds offered.