I am taking hormones?

I am so nervous because in 13 hours I will be going to the doctor to get a prescription for estrogen. I'm 16 and very petite. I don't look masculine and I'm hoping the hormones do a very good job with me. So when I start what should I expect during the 1st week on transition? First month? This has been the dream of mines but when it's here I am totally nervous! I guess because this is a life changing experience. Help me out guys what if I don't qualify for it? 😩 What should I expect the first month? 😮 Thanks for the help! 😁