The benefits

the aperture acted as a chakra bank, which can store more chakra which the body produces excessively after reaching limits

which is released into the atmosphere as the world's nourishment by other humans,

and of course, it too had limits and it seemed unable to produce its own premeval essence too, and so can only be a bank that is better used as a source to grow stronger instead of using it to fight

this will also allow him to store and use rank 1/Gu worms, which will be a tremendous source of utility at the very least and his major strength during his genin days

and if it turned into a blessed land, he could probably rule the world here... probably

Of course that was impossible without ruling the world with ninjutsu first

'Laughable'

And he still didn't know how the power of the Gu masters compared to the Ninjas and especially the Otsutsukis

he expected Kaguya to be at least a rank 6

existence since she was capable of having a nearly limitless amount of chakra and able to travel to different realms without batting an eye

or at most rank 8, since she was nowhere near even pseudo venerable strength

However, even that was arguable since there might be restrictions to strength in the Gu world that aren't here, as everything seemed to be overseen in the gu world by the heavens will whereas, it seemed rather free here

Heavens Will didn't even care to create a venerable every other generation

but he could assume with certainty that the 5 kages were below immortal level strength since the above-mentioned things were lacked by them

and for now, he had something to do daily

fill the aperture with Chakra,

At least it will act as extra fuel...