Based on the photos I would estimate between 2000-2500 FUE grafts to fill in the apex (corner areas) of the hair line and frontal forelock. Generally hair loss is progressive, but because your father has a similar hairline may indicate your hair loss will slow down.
Shock loss can mean two things- loss of the transplanted hair and loss of the native hair. Shock loss of the transplanted hair should be expected, and happens about two weeks after the procedure. This is temporary and the permanent growth begins around the third month. Shock loss of the native hair rarely happens in hairline cases because the native hair maintains it blood supply behind the transplanted area. There is no need for minoxidil for the procedure, although minoxidil can be useful for maintaining the native hair from typical male hair loss progression.
If there is an obvious asymmetry with the hairline, there is no reason to have to wait for a touch up procedure, it can be done anytime.
From the photos this appears to be the beginning of androgenetic alopecia (AGA), or male pattern hair loss. Given your age it is important to see a physician to consider beginning finasteride to mitigate the hair loss as it evolves over time.
This is actually a question about punch size. Using smaller punches (we generally use a 0.80 mm punch for Caucasian cases) will result in a smaller wound size, and allow for tighter hair length.