If one says, "Who am I and what am I worth that I should pray for Jerusalem...will the exiles be gathered and will salvation come because of my prayer?"

His answer awaits him, as we learn, "Man was created individually so that each person should say, 'The world was created for my sake.' It is the Blessed One's pleasure that His sons desire and pray for this [Redemption].

We cannot exempt ourselves because of our inadequate strength, for in relation to all such things we learn, "The work is not yours to complete, but you are not free to abstain from it."(Mesilat Yesharim, Rabbi Chaim Luzzatto)
(L'Chaim)