Well, yes and no. Certainly one should purify oneself before entering the Holy Temple, for example. In any quest, there must come a time of preparation. The High Priest had an elaborate preparatory period before the sublime Yom Kippur Temple service. Nonetheless, Rosh Hashana comes first, because it is the MOST important preparation. Praying for a fixed world is even more important that praying for forgiveness and repenting. How so?
Because without the ideal of Rosh Hashana, our ability to repent and be forgiven is hampered. Rosh Hashana teaches us what our mission in life is, both as a nation and as individuals. It is "To fix the world in God's dominion". Repentance has no power if it does not lead us towards advancing that goal. How can I ever create a painting if I have no idea what one looks like? How can we recreate ourselves through repentance when we have not yet glimpsed our true "selves?"
When we get excited about the world of Rosh Hashana, our repentence becomes focused and urgent. We ask ourselves how we can recreate ourselves to better the world we live in. It's no longer about getting rid of guilt for some mental health reason, but rather preparing ourselves for a holy mission. That's why Rosh Hashana is the ultimate preparation for Yom Kippur.
It is the task of each human being to fix his or her corner of the world. We should not be afraid to dream great dreams about what that world will look like, for only through those dreams will we have a chance of achieving it.
A Shana Tova to one and all!