I don't see a clerical class in the New Testament to which evangelism has been delegated. Preaching is not the only way to evangelize; it can happen in everyday conversations too. And you don't need a special gift to witness to the Lord in these situations.

Some believers are faithful in the way that they live, but at the end of the day, they will not share the gospel with as many people as someone else who has special gifts from God.

We should want to evangelize because of the joy that God puts in our hearts. Ultimately, that's the best reason for sharing our faith.

I think many people in the church are probably concerned that they can't answer all the questions that might come up. I am sure this affects people by playing on their doubts - especially if they have their own questions that they are wrestling with.

Christian proclamation might make the gospel audible, but Christians living together in local congregations make the gospel visible (see John 13:34-35). The church is the gospel made visible.

If you are not offending people, then you are not an evangelist.

Keep going until you get good counsel that is persuasive for you that you should go elsewhere.