Killia

Hello Kilia and welcome to Reborn~

One water type Pokemon I recommend is Primarina! If you haven't chosen a starter yet, then I would suggest choosing Popplio. Primarina has a great move pool and typing (Water/Fairy) and quite useful for certain parts of the game. I don't want to say too much because I don't want to spoil anything for you. If you already chose a starter, then....oops. My bad.

Have fun playing Reborn~

Thanks