Isekai'd into a world I din't know (Temp Hiatus)

This is my first time writing a story. Story; The MC is Alex , who has been reborn in a world where magic/ki/swordsmanship are there. This a world where there is nobles and there will be more added as I progress in the story and I hate harems , so there will no harems or anything of that sort so if there are mistakes I am very sorry Because English is not my first language . So this is more or less just like brief description.