|I have no experience at all with gardening. Please tell me where I can purchase seeds that I can just|
|In my experience, the basis for a good healthy garden is soil preparation. This means removing existing vegetation, loosening the soil, adding organic matter, leveling and raking smooth, and then planting either seeds or transplants. Follow up care includes watering as needed to keep the soil moist, mulching with several inches of organic mulch to keep down weeds, and possibly fertilizing depending on your soil conditions.
I am not familiar with the instant flower bed, but the commercial should tell you where to purchase it, or give you a brand name so you can search for it on google.
The closest thing to an instant garden would be to plant daffodil bulbs this coming fall. They can be planted in a shrub bed or at the edge of the lawn and will grow and bloom for you the next spring, like magic!