If there's no "self" then why should I care about the future lives and nirvana? English is my second language.

If there's no "self', and "I am" is just a "flow" or "mix" of information (dharma, karma, etc.); and if, when I die, "I" (body, illusory self, soul) will die but this informational flow will keep going into another being, and then I no longer exist, think, feel or I will be different being, so this being will be living but not me, then why should I care about his life if I will no longer exist?

Or is it that there is a some kind of eternal selfless "self", the "watcher", that experiences this (and the next) existence and can think, feel?

How does this "informational flow" ("soul"), a conglomerate of functions, get into someone's body? 

Is nirvana an "informational" suicide?

In short, please tell me, why should I care about the next "life" or "going to nirvana" if there's no self, no core and "I", "myself" will disappear after death? Maybe I would stop caring about it because "I" will stop being exist and I will stop feel, think, care straight after death?



PS:

And if the reincarnation is like an ocean water been poured into glasses and back, and there's no core self and individuality is just a mix of informational patters, then maybe it's pointless to try to stop existance, to go to nirvana, because someone will always remain here.

And if this Samsara is eternal then there can be eternal number of Buddhas, beings and they will be trying to get out of this Samsara eternally, then all their actions are pointless.

Thanks.
Whether you believe in a 'self' or not, suffering is very real. You experience it on a daily basis. It is this suffering that makes beings look for an end to it. There's only one permanent end to suffering and that is Nibbana. That is why you should care about striving for it. Craving is what prevents you from accomplishing this. Ignorance is what causes craving to arise. The belief of a self is just one form of ignorance that you have to get rid of in order cut off craving.

Ignorance means not seeing things as they really are. So you cannot get rid of it just by changing your opinion or reasoning it out. You need to start seeing things as they really are.