When it comes to a promise from God, there are those that are instantly met in Christ (2 Corinthians 1:20).
These include forgiveness, favor, and peace with God.
Then there are those that He asks you to take steps toward.
These may include a new career, a ministry opportunity, or reconciliation with friends or family.
In my experience, you will encounter 2 obstacles on your way to this kind of a promise.