I think instead of worrying what the elders are doing or not doing for encouraging a youth to participate...why not turn to your Lord in prayer and ask Him....Dear Lord I wish to be able to glorify you more in my assembly....show me the way, encourage me, guide me to do your will so that it glorifies your name.
Elders are humans...why look to them to be perfect in everything when we already have a saviour who is perfect in all ways. Why be scared of the elders...there is something wrong in that picture if believers are scared of their elders...because that is not the purpose of the elders.
Do you not think that if you commit yourself to this purpose of being more active in your local church, our Lord will not open doors for you ? . It is possible, but this requires a true commitment from your hearts and some truly fervent prayer. It may not be an immediate or self-gratifying either. It may not even be what you think you are capable of...but when we allow ourselves to be used by God, anything can happen.
Parents can earnestly train their children in prayer to be active in their local assemblies, by small things like helping the needy with your time, volunteering time with older folks, doing chores for them they have difficulty with, voluteering to help those who have trouble coming to church, encouraging in prayer those you know need help or are troubled, chores in the church whether it is cleaning it up thoroughly, helping with any organization, administration, fixing things, helping mothers by offering to look after babies while they worship, assissting sunday school teachers etc.
Do you think the elders would discourage you in these simple services for the Lord?
You cannot tell me that church has nothing for the youth to do...but be silent and watch worship as silent spectators.....that is if your idea of "active participation" is , for example, only delivering long speeches to show how well read you are in the scriptures...then I think you are missing the picture in true service and participation for the Lord. Serving the Lord with "humility" is also active participation.
You may not recieve any recognition or praise from men for doing some of the stuff I mentioned but the purpose of a believer is to live a life to glorify God...and the smallest things you do is a contribution and a participation in the sight of the Lord.
This is just my 2 cents......