Gamer in Overlord

My first ever try at writing a story, so it's gonna be bad. But I would like to become a better writer so i would appreciate any helpful advice or criticism. Anyway, it's a Overlord SI/OC story. A guy dies, gets 1 wish and then gets thrown into a world he seems unfamiliar with. Now it's time for his great adventure. English is my third Language. I write on a phone. And my Internet connection is bad. So if you think there's something wrong with the fic, it's not my fault XD I do not own Overlord or the characters mentioned in the story. I do not own the cover photo. I only own The OC.