Psalm 1 says that He who delights Himself in the Lord will prosper in all He does. What is biblical prosperity? It means that you will have all your needs met, you will have no lack (Psalm 23 says the Lord is my shepherd, I shall not be in want), and you could possibly have an abundance. The latter depending on whatever God calls you to do in life and how good a steward you are with whatever He’s already blessed you with.
Biblical prosperity means you will not be in want nor have a lack for anything, and anything you set out to do you will excel at (as long as it doesn’t go against God’s Word). If you truly surrendered to the Lord then whatever desires you have on your heart are probably a reflection of what God wants for you.