Wandering Through The Multiverse

Alex, a 20-year-old guy, is suddenly transported to an unknown world. The only information he has is that he must complete the main task; however, why doesn't it appear what it is? Besides, he only has a random draw of a skill corresponding to the world to help him. Will Alex be able to complete the unknown task? And why does it seem like he's in the 19th century?

This is a fan-fic about a journey through the multiverse, involving video games, TV series, anime, etc.

First World: Red Dead Redemption 2
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Hello! This is my second fanfic; I abandoned the first one for certain reasons, but I'll try to continue with this one whenever I can.

Minor doubts about the system, check the auxiliary chapter

My first language is NOT English. Comments with spelling corrections are greatly appreciated. Thank you!