I'm a new christian in a pretty atheist family so I don't have any christian friends yet. Does anyone want to be friends? I'm 17 from the uk. Also if anyone has any tips on how to pray I would appreciate it.
May God bless you with some good Christ-following friends and mentors when the time is right, but I have a feeling that maybe God wants you to get to know Him and your Bible for yourself first. All Christians have errors and preconceived notions about who God is that they end up passing on. It isn't that Christians don't have anything worth sharing - the Bible even emphasizes meeting together, but perhaps you need to develop something of a clean foundation for yourself first.
As for prayer, the Bible says to pray without ceasing (1 Thessalonians 5:17). To me that means that while it can be good to have dedicated prayer time with God, I just talk to God throughout my day, like a friend present with me. I might thank him for protection on a trip or a beautiful flower. I might tell him a joke. I of course ask Him for my needs as they arise too, whether food, peace, time, healing, protection, understanding, etc. It can be as brief and solitary as a silent cry of "Help!" while you work, or an hours-long session with friends taking turns leading as they pray together about a certain subject that God is dropping on their hearts. I have also heard of someone having a snowball fight with him - God can be much more fun than many know.
Also, don't forget to listen for a response, especially if you ask God a question. He speaks to everyone differently, though, and differently at different times. Sometimes people hear literal words. Sometimes they get a sudden understanding. Sometimes they just KNOW something. Sometime He draws one's attention to something. Sometimes God answers through life (like a sudden phone call, or God letting you discover the answer for yourself because He knew you were going to anyway). Realize, though, that some answers are instant, and some may take a long time for Him to answer, years even.
Basically prayer life with God can be like having an invisible friend, but unlike the imaginary kind, God is really there, really cares and actually responds.