Nirvana means the "cessation" or "blowing out" -- phooof -- of the self-clinging "kleshas" (Greed, Hatred & Delusion) that make one so uneasy.
Blow them out in one breath, like the candles on your birthday cake!
This Nirvana is a perfectly wonderful goal in every possible way. By attaining Nirvana (the natural, Sahaja state), one lives joyfully, obsessed only by sheer wonder.
Having attained Nirvana, one can develop abilities & approaches to help others attain it, & that's arguably even more wonderful.
To realize true "selflessness" right in the mythical here-now is great bliss, great awareness, & the source of unbelievable equanimity & strength.
But the "hijacking" of Nirvana by religious greed, hatred of "others" & religious ego is unfortunately widespread.
You ask: How can Nirvana be the goal of a small "self"? It can't.
Then whose goal can "Nirvana" be?
"Don't know! But here's a clue:
Right now, at this very instant, who are you?"