Not sure I fully understand the situation.
I 2nd the point that tree skirts are supposed to be open so one pushes the hole around the trunk.
And I 2nd the person who mentioned not bothering. We hardly ever have, my whole life. Most of the time, the tree boughs are so close to the ground no one can see much under there.
If you’re literally just now getting a tree up, wait for the boughs to sag once they warm up. The tree won’t be quite the shape it was at the sale grounds where it is (presumably?) colder than your house. One has to account for that when buying - the boughs will sag after a few hours.
I always trim up the bottom boughs...Makes room for smaller presents and allows me to climb under the tree to add water to the base...Usually use a white, red or green sheet and sprinkle glitter on it...
The skirts I was seeing have maybe a 3 or so inch hole in the center, like it would go around the actual trunk. But this base is huge. At least 2 feet diameter. But these ideas with fake snow and sheets and stuff, we will do that before the surprise.