God does have a plan for our lives. Concerning all of humanity God's has willed several things:

All People To Become Christians

The Bible says that God wants everyone to be saved:

This is good, and pleases God our Savior, who wants all people to be saved and to come to a knowledge of the truth (1 Timothy 2:3,4).

He is slow to judge unbelievers because He wants them to repent.

The Lord is not slow in keeping his promise, as some understand slowness. He is patient with you, not wanting anyone to perish, but everyone to come to repentance (2 Peter 3:9).

Human Stubbornness

Therefore, it is not God that keeps people from being saved but rather humanity's stubbornness to believe God's promises. Though it is God's desire that everyone believes in Christ as Savior, we can thwart that desire by rejecting Him. Still, God does want everyone to come to know Him.

God Does Have A Plan

First, God does have a plan for us. The Bible says:

And He made known to us the mystery of His will . . . according to His good pleasure, which He purposed in Christ, In Him we were also chosen, having been predestined according to the plan of Him who works out everything in conformity with the purpose of His will (Ephesians 1:9.11).

God's Plan Is Good

Furthermore, the plan of God for our lives is good.

Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is — his good, pleasing and perfect will (Romans 12:2).

Christians To Be Like Christ

For Christians, God's desire is that we should be like Him. He has told us that someday we will be made like His Son:

For those whom He foreknew he also predestined to be conformed to the image of His Son, in order that He might be the firstborn within a large family (Romans 8:29).

Ultimately we shall be like Christ. This does not mean that we will be God or have any of the attributes of God. He is the creator while we are the created ones. Any abilities or talents that we have are given to us by Him. The Bible makes this very clear. The Apostle Paul wrote:

For what makes you different from another? And what do you have that you did not receive? Now if you did receive it, why do you glory if you had not received it (1 Corinthians 4:7).

Christians Are To Bear Fruit

Finally, it is God's will for Christians that they be useful, they bear fruit with their lives.

For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand that we should walk in them (Ephesians 2:10).

Summary

The Bible says God has a plan for humanity. For unbelievers His desire is that they should come to know Him. Once a person becomes a believer, God begins to work in their life to make them more Christlike. Ultimately every believer will be conformed to His image.