evangelical is not a denomination , it is a designation for all christians who believe that the gospel of Jesus calls for a believing response, unto a New birth, by faith in Jesus. There is a continuity down through the centuries, the early church was an evangelical, pentecostal christianity,and there have always been evangelicals. One would find the doctrines of the evangelicsls by reading the scripture, listening to evangelical teachers, reading evangelical teaching. They come from all mainline Protestant and even Catholic churches, but they have this in cmmon, they profess a NEw Birth through the resurrection of JEsus.
You are totally winging it.