Hey Caroline,
Let me first start off by saying, I think its amazing that you are looking into becoming a Christian and letting God be a part of your life! Let me tell you, your life will change for the good in so many ways you'll loose count. When you let Jesus, God, and the Holy Spirit into your life your outlook on life becomes so much better.
Now, those many doubts you see and have are normal. The doubts in our minds are to test our faith in Christ. We will always have those little doubts sometimes and only our faith can overcome that. As far as getting that faith, thats up to you. But there are things that might help you kick start that faith. Number one, i suggest you read your bible. There are so many stories and miracles inside that book i dont think anyone has counted them. By reading your bible your going to see the proof that God is very much real and Jesus did in fact die for us. Number 2 i'd go to church, even if you don't fully believe yet, go to church and listen to the pastor's lectures, our elders know so much more than us and listening to them tell us of their knowledge about Christ is a great way to get that faith of yours started. My last suggestion to you for kickstarting your faith; is to just ignore all doubts in your head, realize that there is no way you were created by "Luck" and be thankful that Jesus died for our sins. My last resort as to helping you start you faith is to ask you, honestly, do you believe in ghost, demons, and the supernatural? If you answered yes, where do you think those come from? The Devil, Satan. If those things are real, that means Satan is very much real, and if Satan is real, than God is ohh so many times realer!
Now, After you've got your faith, and you truly believe that God created earth, and Christ Died for you; start following the life style that god wants us to. If you read your bible or even google questions, you will find out how god tells us how to live a successful and great life. And here's the best part. When you let God take control of your life, I can promise you, your life will be so much better, even at times when it may seem like all is lost, God is not. He's always there to talk to and ask for anything. And don't expect Miracles everywhere either because that wouldn't be much of a test of our faith if that were so. And when it may seem like God isn't helping, keep your faith because he is doing what is best and later down the road things will always become better through him.
I hope this helps you get that faith your hoping for in Christ. Its unlike anything else in this world once you get it.

Heavenly Father, please help Caroline find her faith in you and your son, and the Holy Spirit for she wants to add you into her life. Please show her the way and help her with all of her struggles.