What if I were to tell you that I watched/read every single anime/manga out there?
Lmao Sis.π
Have you try Haikyuu or Kuroko no Basket? Those would be a good sport anime for beginners.
For Harem, I personally enjoy most of them but the better ones would be Date A Live, To Love Ru, Nisekoi, Quintessential Quintuplets.