HP: The Transverser

A journey of a transverser who has travelled to different worlds and now is in the HP world.
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The MC will have no cheat system, just the memories of the previous worlds.
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The timeline of certain things might change as this is an AU.
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I don't know how it will turn out to be as it just my attempt to write an idea that came to my mind so there may be few errors here and there, so I would like to apologise for it in the beginning.
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MC will not be Overpowered in the beginning as he cannot carry any skill or physical item from the previous worlds.
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Disclaimer: I don't own Harry Potter series and any of it characters.