Infinity is a man made construct. The idea that you can divide something, anything into 2 halves, or any other apportion doesn’t work at the quantum level. This is because energy and space are themselves separate entities composed of discrete units, the smallest of which cannot be divided. Matter itself at the smallest level still being matter is also an indivisible entity - a quark.
The universe has a finite number of composite fields, matter and energy, therefore, any combination of each is also finite. Even time has an indivisible, discrete smallest length before it slips into the theoretical.
The part of the universe that exists but has no form outside of what is stored or exerted is information. Information can only be perceived as it is manifesting. Any combination of any concept or perception in the sentient being can exceed the known and extant. The possibilities are infinite, but the manifested information is always finite.