I mean, good for him that he can do this, but from a logical prospective the fact that he can copy bloodlines from injured cells but not healthy people while he can copy affinities from healthy people doesn't make any sense.
your timeline is mess up the mc is 8! kakashi is 5! sakumo was death! but is fighting sand village later on! gennins graduate at 12 but just a few months later the mc is graduating!