People may even speak a strange jargon. Terminology can be confusing. Now there are many different translations of the Bible. It can be difficult to follow along when someone is reading from an unfamiliar version of the Bible. Ritual can be confusing.
Some churches are heavy on formality, others are very flexible and unstructured.
A person could lose sight of the essentials in all that is superfluous. The Bible can be confusing. To get to the heart of Jesus' message read the Gospels, the first four books in the New Testament. Later you'll read the rest of the Bible with greater understanding. Christians can be confusing.