Hello, personally, I can advise you
read isekai on the website of the MangaRead project. Isekai (異世界) is one of the most popular genres of modern manga and anime. This word is translated as “another world”, from which it becomes clear what the plots of the stories of this genre suggest. Namely, getting into another, if you like, "parallel" world, not a classic fantasy, where a priori its own world, with its own rules, namely, the collision of parts of our world (most often the main characters) with another, is alien to him.