Two Sides Of The Same Coin

In a world invaded by portals to other worlds, some humans obtained a power called System, which allowed them to level up and become stronger. Now a new career existed: the Adventurer, one who ventures into these portals to complete quests given by the System. An Italian boy, Samuele Rua, received this power and now had to become an Adventurer and venture inside the portals, leveling up and becoming stronger.
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I apologise from the beginning for the bad writing, bad grammar and all the bad things in this book.
This is my first attempt at writing an... original... story. Yeah...
Anyway! If you have some time to spare, please give this book a chance and comment with what you like and dislike about it. Any constructive criticism is appreciated.
If you find this book disgusting, well... I don't blame you xD.
if you have come this far and still have the guts to read this story, good luck to all your brave hearts!

P.S. Cover image not mine!!!