first think first, what kind of bitcoin wallet you use? to buy bitcoin, you only send your btc wallet address into the seller, you pay the money that equal with the btc amount that you want, wait the process until its completed and you have your first bitcoin in your wallet. you don't have to use or give your email address and that is not necessary unless you want to register in market exchanges and you want to buy bitcoin from that exchanges.

my suggestion is better you find your friend and buy btc from your friends because this is your first time to buy bitcoin. but before you buy bitcoin, just make sure that the price is not too high so you can get much of bitcoin so you sold it when the price is increase soon.