Dimensional Adventurer
Giotto di Angelo, a young Italian man adrift in life, becomes entangled in a supernatural event when he witnesses the arrival of a dying interdimensional traveler before him. In an attempt to help, he inadvertently inherits a fragment of the traveler's power — the ability to cross the vastness of the multiverse through sheer force of will.
Giotto must learn to survive, forge alliances, and face unimaginable entities of unfathomable power, all while he himself grows ever more godlike. Meanwhile, in his home world, family problems, debts, dead-end jobs, and a crumbling everyday life await him, threatening to destroy what little he still cares about.
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Grimdark, Multiversal, Fantasy, Eldritch Horror, Mistery.
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The cover of the story is not mine, I downloaded it from pinterest, rights to its creator.