Probably a few job vacancies in the democratic republic of congo whenever you are ready ...I'm not really worried about death, but I wouldn't mind sticking around.
I presume your surety is simply your ideas of knowledge following your values/opinionsI quite sure not one theist has ever known what happens after you die.
Personally I think it would be a great surprise to be able to give a car a wheel alignment tooPersonally I don't think I'll continue anywhere and if I do it will be a surprise.
(.... mainly because, personally, I am not a mechanic)
I think the concern lies more in what preempts the next life - Death.Again, atheism is about an absence of belief in God and I can't see why afterlife is a concern.