Dude,
It's a who you know outfit.
So, you gotta brown nose some elder who has been assigned responsibilty for a specifc duty in the KH. Also, you gotta show yourself are zealous hardworking spiritual man.
Make meaningful comments at the meeting, also you gotta do volunteer talks if they need one. All this adds brownie points, not just your preaching, but other ways you can contribute to the cong.
Obviously if you were an elders son you wouldn't have this problem...
Kep