How should i wear my hair for school pictures ?

soo , i have pictures soon . how should i do my hear and what should i wear ? my hair is reaaalllllyyyy thin , and dark blonde , and its to my shoulders . i have gym 2nd block so nothing that can get messed up easily . i want it down but what can i do with it ? i also reaallly like styles with braids ... and what should i wear ? you only see from your shoulders up . hellp ! thaanks !