Start up warning

I'm going to just say this am still a noob writer so don't expect a mountain out of me but I'm not saying you can't criticize just put that as a consideration ,and oh the protagonist will be invisible but the emphasis on his strength will only be in the beginning chapters after that , not much maybe once a while and oh this is just a heads up he is reborn in a world like ours and I am going to say this I'm not going to focus the the characters from one nation