How I accidentally started a harem in another world

I was reincarnated, by mistake, into a world of swords and magic after dying in a car accident. Gaining new overpowered abilities, I wanted to explore this new world, enjoy the freedom and accidentally start a harem? There will be at least one chapter per week unless I am sick, dead or busy building a new Gundam model. English is not my first language, so please let me know of any mistakes. Tags will be updated as the story progresses.