Acquiring a Low-Level Dimension in the Marvel Universe

A man in his thirties finds himself transported to the Marvel world without any system, superpowers, intelligence, or talents for a long time, until one day he discovers a galaxy in the basement of his house.
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Note: Since I don't want to delve into the extensive Marvel comic universe, I will choose the cinematic world as a template. However, as a person not particularly drawn to the cinematic world, I will change many things—some from the comics and some due to our main character's personality (for example, I will use Tobey Maguire as the embodiment of Spider-Man instead of Holland).

Secondly, English is not my first language.