If I were you I would focus on building up your relationship with
God, rather than chasing after gifts you have decided to select for yourself.
Who knows maybe be God has something better for you than you have
selected for yourself.
I assume you are still young in Christ, we have to learn in stages just like
a baby, learning to crawl, then walk then run, it sounds as if you want to
run before you can crawl.
There is nothing wrong with being enthusiastic but God is far wiser than we
are. You wouldn't give a baby matches to play with just because they are
fascinated by fire.
Gifts come with great responsibility you have to show you are responsible enough and
mature in your Christian walk to handle them, otherwise you will cause great
harm to yourself and others.
Gift of true prophesy is very rare and no one can give it to you except God.
Then there is also words of knowledge which are different. The two often get confused.
No one can explain what it is like as it is different for everyone, God may speak to
one person in one way but in an entirely different way to someone else. God always
speaks to people in a way that He knows works for them. If you know God is
speaking to you, then you just know it.
We could all share how God speaks to us but it might be different than that for you.
As for preaching, the immediate thing which comes to mind, are you in a good solid
bible believing church. If not why not.
Preaching ministries often start out by learning in a church setting then over time,
been given chances to take meetings here or there. Maybe even getting an
opportunity to take a service if your gift is recognised by others on the church.
People don't usually go from nobody to somebody ovenight, there are steep
learning curves to go through.
1 Peter 2:2-3 NKJV
[2] as newborn babes, desire the pure milk of the word, that you may grow thereby,
1 Peter 5:5-6 NKJV
[5] Likewise you younger people, submit yourselves to your elders. Yes, all of you
be submissive to one another, and be clothed with humility, for "God resists the proud,
But gives grace to the humble." [6] Therefore humble yourselves under the mighty hand
of God, that He may exalt you in due time,