Mvdg2001

Hey, I just bought my first telescope and are having quite some fun with it. it is a Sky-Watcher Explorer-150PDS (OTA) (f/5) 150mm Dual-Speed Newton. Now I am still using the eyepiece that came with the telescope the Skywatcher 28mm LET eyepiece with 2" barlow. I feel like this eyepiece is not the best option for planetary viewing, and really want to upgrade to a better eyepiece (as I believe this one only gives 30x magnification with my telescope.) I am quite new with telescopes, and would like to get some help regarding picking the best eyepiece for my telescope (particularly for planetary viewing.) I hope some of you can help me out!