What do you think about the "empty state"? Is it really possible to manifest anything in the void?
What we often call the empty state or emptiness is more clearly known as sunyata.
When Buddhists teach of emptiness, what is actually empty?
Firstly they mean empty of inherent self.
While in Hindu yogic philosophy ultimate reality is sometimes referred to as the Self, in Buddhist philosophy it is sometimes referred to as Emptiness or no-self. Both perspectives teach something useful and both are equally true.
The key distinction here is inherent. Although I can speak relationally of my own self and your own self as individual humans, those selves are temporary appearances. They are formed from transient phenomena that have come together at this specific point in time to give the appearance of an individual. But this individual has a beginning and an end, therefore there is no inherent aspect of that individuality. It does not exist outside of or independent of circumstances.
That is the Buddhist meaning of no-self and it is one particular meaning of Emptiness.
As an aside to close the loop here, in Hindu yogic philosophy, the Self is ultimate reality and it is One without a second. There does not exist two selves, just the one Self. That Self is known by all beings as the feeling "I exist." If you trace that feeling of existence to its source, you arrive at the Self as ultimate reality.
Secondly, there is another meaning of Emptiness which is nothingness--or better understood as No-Thingness. The more I talk about this aspect, the quicker it will seem abstract and strange. So lets just use a quick metaphor.
When you dream at night, you experience yourself in a body in a world. That body is not real but it is based on the physical body you experience throughout the day. The same goes for that dream world you experience.
Even though both that dream body and that dream world seem real with plenty of dream people and dream objects to encounter, in reality all of that is just consciousness taking on different shapes. That is no-thingness, when the distinction between subject and object collapses.
Again, all of this is a way to describe the nature of ultimate reality while also putting into perspective the relative reality we experience as this incarnate dream.
Lastly, you ask if it is possible to manifest anything in the void. My answer would be to look around you. It already has.