Bolivia... so i am a 14 year old girl who is traveling to boliva by myself in a couple of weeks.?

I am flying by myself from america and then when i get to Bolivia I will be staying with my bestfriends family. My bestfriend is already in Bolivia she flew a couple days ago. She is Bolivian and speaks spanish. I dont speak spanish though and im kind of worried I will stand out because I am tall and my ethnicity is german and swedish and i have blonde hair. Do you have any advice for me? Like things i should be careful of? also im staying there a month and a half