I think I was about 18 when I first preached a sermon. Spasmodically through the years that followed I was invited to preach - a particular hat-tip to three vicars through those years, Paul Hammonds, Derek Eaton, and John Meadowcroft, who made those opportunities available. Then I was ordained and opportunities came more frequently. If today I have any thing to offer through preaching it has been through experience, and reflective learning on it. I am very glad for an early start.
Yesterday I was at two different services and, as it happened, at each service a young person preached. Indeed for one of the young men it was his first sermon ever! Both preached well and both should be given many opportunities to preach again. The future of the church depends on many things - we rightly emphasise good leadership, great liturgy, prayer power, vision, training, ability to adapt to changing circumstances and the like. But it will not be a better future than the present if there is not good preaching - inspiring, generative, evangelistic, didactic preaching that brings the whole counsel of the Word of God written to God's church.
So, personally, but I hope for you also, it's a matter of great encouragement to hear people considerably younger than myself preach with present ability and future potential!