Spiritual help please!

Hi ladies! so i am in need of some advice, I'm 14 and want to believe in God but it seems like I just can't. Let me explain, I wasn't raised religious and have had trouble believing in God at all I really want to but I can't stop second guessing myself and thinking I'm just being silly and unrealistic. I do believe that there had to be something that created the earth I'm speaking scientifically here, but how do I know that it was the Christian God and Jesus. If anyone has struggled with this also any advice would be helpful, thank you ☺