Hey amjad,
I grow goji berries, but my plant came from rooted cuttings rather than seed. In that form it really is a tough plant, which is fruiting now despite being transplanted in mid summer. But what i have read from other members is it can be difficult to bridge the gap between sensitive seedlings and resilient plant.
here is one thread about starting goji seed
Although the fresh berries taste somewhat funky at times, the flavor is growing on me. I am also kind of waiting to see what kind of harvest i will get from a single bush before i go about rooting 20 cuttings around my land. Ill probably put some in with the chickens and see what they think etc.
Seems like a great permaculture plant, the farmer i got the cutting from remarked that his full grown bushes couldn't be killed so he had pretty good faith of my cutting growing, and he was right.