I just need someone to reassure me I won't face anything bad in the afterlife because I couldn't be bothered with that I'd rather just have oblivion.
I thought I could help until I read the reassurance bit. Anyway consider that the afterlife is very similar to the life you have in dreams when your physical body sleeps. Is that life any worse or any better?
If you have not done horrible things, then the afterlife won’t be terrible for you but that does not mean that it will be oblivion or that you will be happier there. It will be more of the same. Thus suicide is not a way out, but is rather a way into the same thing in a psychological and non-physical way.