Difference between Here goes and There goes

here goes—(also: here we go) said by a person ready to begin smth. that takes skill, luck or courage:

• “Here goes!” said Charley, as he jumped off the high diving board.

there goes—is used to express regret when circumstances prevent one getting smth.:

• When I was in the States, I heard they canceled the project and thought, “There goes my job.”