Can I be a Christian and still have doubts?
Yes. Doubt isn’t the opposite of faith; unbelief is. Many people in the Bible doubted, including John the Baptist and the disciple Thomas, and Jesus met them with patience.
A father once said to Jesus, “I believe. Help my unbelief!” Jesus healed his son. That’s a prayer you can pray too.
Bring your doubts into the open. Ask questions, read, talk to someone you trust. Faith that has wrestled with doubt is often stronger for it.
From the Bible
Immediately the father of the child cried out with tears, “I believe. Help my unbelief!”
Mark 9:24
On some have compassion, making a distinction,
Jude 1:22