Resort and Resorts

Hi ! i am going to thailand in july and staying 11 nights in phuket (Centara Resort Karon Beach) and 2 nights in bangkok (Indra regent Hotel) it is my first time traveling out of australia and i am very nervous, i am 18 and am going with my boyfriend, does anyone have any advice or stayed at these places before? Or have any good tips on things to and not to do ?? Thanks heaps