Hey there fellow human,
I'm really sorry you're feeling like this. It seems like you/some part of you isn't ready to leave yet, and I think if that's the case trying to catch the bus is not the thing to do (yet). And as far as I can tell as long as people don't really want their existence to end they usually also won't be able to catch the bus.
So maybe you still have things you want to do, things you want to try to get better?
This community is also for people who are also just really struggling with life but want to give things another go, not just those who already have decided that they want to leave soon, so you're still totally welcome here if that's the case and there are many people here who'll be there for you.
But anyway, the only one who can know when the time has come for you to leave is yourself. Maybe that's in a week, a month, a year from now or even longer away. But if the time is right, you will know.
That said, I really understand your inner pressure to leave at the prospect of all the additional future suffering and I really hope that you won't have to experience it or will be able to leave if things truly get too much for you. But I think that if that moment ever does come people usually want to leave and then are able to if they have access to a method. You can prepare your method(s) and get everything sorted out, but I think you'll only be able to leave if you truly want to.
Love,
DD