The most important thing that God desires for you is not to fulfill a particular assignment/task/assignment on earth. The most important thing that God desires for you is to be in intimate, personal relationship with Him, to see Him & experience Him as your Daddy & you His child. Purpose/assignment will follow thereafter, as a by-product of this intimate relationship. He will tell you what to do. However, God doesn’t want you for what you can do for Him. He wants YOU. Fullstop
So seek after purpose; seek after intimate relationship with God. Therein lies the fulfilment, therein lies the success you are looking for.
John 3:16 NLT
“For this is how God loved the world: He gave his one and only Son, so that everyone who believes in him will not perish but have eternal life.
John 17:3 NLT
And this is the way to have eternal life—to know you, the only true God, and Jesus Christ, the one you sent to earth.