The second hairline that includes the temple blending work would hypothetically look better if nothing else changes. But it looks like your temples are actively receding, so I would be worried about progressive hairloss behind the implanted hairline starting to look patchy and unnatural. At your age it seems premature to expect that anything has stabilized, so as others have said, you might want to wait. I am far from expert, but in my novice research, it seems like more conservative numbers of grafts have a better chance of surviving, since bloodflow to the are is a limited resource. Too much all at once can cause shock loss to existing hair, especially if they are already suffering from miniaturization. If you are determined on getting a HT sooner rather than later, I would go to a reputable clinic and get a full expert evaluation.