hau Denise, what a question you pose, there are perhaps as many answers as people that will respond.
I will break this down so that it is easier for me to make suggestions that would be viable to this situation.
Restoration of the great prairie lands, for this it would be feasible as long as you have plenty of land to work with or you have connecting neighbors that also want to create a broad area of restored prairie.
Now to do this right, you would also need a herd of Bison since these are the animals that helped keep the prairie in good shape for thousands of years.
There was a great diversity of grass plant species on the great prairie, so you would need buffalo grass, sweet grass, sages, plantain and a host of other plants (the great prairie was where many medicinal plants grew along with the grasses).
Planting trees, While there was the odd tree scattered about, they tended to be very spotty and in clumps of same species, these were far between each other (miles between clumps of trees).
The species were oaks, pines and cedars(juniper until you got near the now Canadian border where true cedars could be found along the western border of the prairie.
Fire was (and is) the main disturbance factor, today humans strive to put out the rejuvenating fires as quickly as possible, thus depleting the soil of nutrients that used to be recycled because of the fires.
Since it was cattle farming that changed the plant kingdom of the prairie and that created the disappearance of animals habitats, the animals left to find spots where they could live.
Wolves were abundant according to prey availability, cattle are convenient prey since they are fenced in so naturally the rancher's decided that the wolf was the enemy and proceeded to kill all of the wolves they could.
This means the animal diversity is also gone and to do a proper restoration of prairie, you have to be able to bring back the whole system, not just parts of it. Bones of prey are an important part of an ecosystem, they give calcium and other minerals back to the soil.
Since we are human beings (as opposed to beans (like the ranchers are for the most part)) we want to bring back what nature had selected as the ideal ecosystem for this area.
The question is "if we don't have hundreds of thousands of acres to do this on, can we still manage to do a restoration.
We can do Restoration of prairie lands but we will never be able to restore the great prairie, that would be impossible without full cooperation of all the people living in the great prairie.
Now to doing this sort of thing on an individual basis.
If you have enough land to support your family with food and there is acreage left over, then you are in the position of being able to do both, feed your family and restore a bit of the prairie for animal habitat.
The more left over land you have, the bigger your restoration of prairie and that means there will be more animal diversity habitat available for them.
Since we have to be able to live at least mostly like we want to live, we need to take our own needs and put these at the top of our list so we don't become discouraged later on and undo that restoration we did in the beginning.
For a homestead to also be a restoration project area usually requires a minimum of 10 acres if you are not going to raise animals larger than geese (goats, hogs, sheep, cattle, all will need a minimum of 10 acres for best pasturing practices).
I have worked with only a few farms that did meaningful restoration projects that lasted, these were farms of 10,000 acres and up to 1 million + acres of total land area.
On each of these farms a 5% portion of the farm total land area was set aside for the restoration project and these projects are still in place. (this is probably because they get an "allowance" from the USDA for keeping the restoration in place)
On the few farms that were smaller than 10,000 acres, none still have their restoration area in place, all have been either sold off to developers or the area was reincorporated into working fields.
Doing a restoration project on a homestead is possible but only with completion of a total, overall plan on paper for determination of viability so that the restoration work isn't undone in later years for need of that land for food production/ living spaces.