Recommendations for Short Stay in Lombok

I am going to be in Lombok for 2 night's, so just one full day there, though I am aiming to book an early flight on my arrival date to hopefully make the most of my first day. My hostel is located in Kuta Lombok a 12 minute walk from Kuta Beach according to the website.

I am looking for recommendations for what beaches I should visit and if I should just aim to go to one beach (I guess that depends on the distance between the recommended beaches too).