(1) Take a leap forward when God's call comes and trust that He will be there with you through thick & thin. Faith comes when you take that leap.
(2) Do nothing when God's call comes, He will engineer circumstances to grow faith in you. Faith comes when you're pressed into a corner and have no other way but trust.
Faith from either of the above pleases God. But if I get to choose, I'd pick (1). This is called wisdom.