The question that I have is why do you want this gift?
If you are not sure how the Holy Spirit speaks to you, it may be that you are not fellowshipping with the Lord in a way where you have learned to discern the Lord's voice apart from the voices that come from the world, flesh, or the devil. The promise is that if you seek the Lord with all your heart, you will find Him.
The point to remember is that it is the Holy Spirit who distributes His gifts according to His own will, and not ours. Therefore, the first step in determining whether a particular spiritual gift is for us, is to be sure that it is God's will for us. Unless we spend time with the Lord in prayer and His Word, we may try to use a gift unwisely with harmful consequences. The Scripture says, "Be not unwise, but understanding what the will of God is."
It takes a high level of maturity, much experience in the ways of God, and much wisdom, and great love and compassion for others to be used in the Word of Knowledge. And the person has to be involved in the appropriate ministry in which it can be a valuable and useful tool, especially in personal counselling. Therefore, the gift is not award to anyone who wants it for the sake of having it.