Is being conscious of actions' consequences enough to attain nibbana? I apologize if this has an answer on this site or if this does not make any sense. I am wondering if being conscious alone is enough to attain nibbana? If not, why?

I think conscious person will (always?) act in a way that will not cause sorrow to themselves (and others?). I just thought someone who is fully aware of their thoughts and actions will only work towards a joyful life. If someone does anything that leads to sorrow, I think it's only due to lack of consciousness of it's consequences.

However, I am not sure if being conscious alone is enough to develop the wisdom required to attain nibbana. Can someone consciously do unwholesome deeds? I would like to clear this up. Any help is appreciated.
It seems to me you are defining consciousness as "being fully aware of consequences" and therefore "acting towards a better state", correct? (Just so you know, usually this is called "acting with virtue".)

If this is how you define it, then yes - acting with virtue is enough for Nibbana. The cool thing about acting with virtue is, the more you do it, the more it changes your life in the direction of Nibbana, the easier it gets to act even more virtuously. In fact, clearly understanding this self-fulfilling principle is exactly what's called Stream Entry.

The only other factor you need for Nibbana is to always keep improving  your virtue, always looking for ways to make it more sublime and more refined. For this, you need to be 100% honest with yourself, even critical.

Taken together, these two factors - Acting with Virtue and Continuous Improvement - will create the right cyclic engine to propel a sentient being to more and more sublime forms of happiness until complete Nibbana.