The Bible is very clear that this is a personal choice. You need to pray and read God's word and serve your community in Christ. If you focus on trying to be less worldly, you will fail. That approach never works. Rather, you must displace worldliness with Godliness.
1 John 2:15-17 Do not love the world or the things in the world. If anyone loves the world, the love of the Father is not in him. For all that is in the world––the lust of the flesh, the lust of the eyes, and the pride of life––is not of the Father but is of the world. And the world is passing away, and the lust of it; but he who does the will of God abides forever.
In this verse, John tells you to decide and then act. "Love not the world" and "do the will of God." How do you know what to do and what God requires of you? Only by means of His Word.
2 Peter 1:4 ...by which have been given to us exceedingly great and precious promises, that through these you may be partakers of the divine nature, having escaped the corruption that is in the world through lust.
How are you going to find out about those "great and precious promises" if not through His word? These promises provide the goal of a Godly life. They give us hope and motivation to persevere and keep our focus fixed on the hope of the high calling of God in Christ.
Philippians 2:7-14 But what things were gain to me, those I counted loss for Christ. Yea doubtless, and I count all things but loss for the excellency of the knowledge of Christ Jesus my Lord: for whom I have suffered the loss of all things, and do count them but dung, that I may win Christ, And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith: That I may know him, and the power of his resurrection, and the fellowship of his sufferings, being made conformable unto his death; If by any means I might attain unto the resurrection of the dead. Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus. Brethren, I count not myself to have apprehended: but this one thing I do, forgetting those things which are behind, and reaching forth unto those things which are before, I press toward the mark for the prize of the high calling of God in Christ Jesus.
I hope you have found this helpful.