You need to have faith the size of a mustard seed. Yes, its that little seed.
Why?

Jesus said, "The Kingdom of Heaven is like a mustard seed planted in a field. It is the smallest of all seeds, but it becomes the largest of garden plants and grows into a tree where birds can come and find shelter in its branches." (Matthew 13:31-35 NLT)

Begin to build up your faith, starting from the mustard seed and it will gradually grow to become the largest of garden plants. That is what faith is.

But it's not easy. To have that small amount of faith requires a great amount of discipline. Build up on it now.