Earth will be fine. Life is just a singular organism that’s existed for billions of years and we’re a part of it.
AT some point the organism may die, but it will live on whether the human shaped cells are still there.
I’m not worried. My awareness part will be done, but I’ll be part of some other part of the organism by then, long recycled naturally in some form or another, even if I’m calcified somehow and just act as support structure for the planet that the organism lives with.