“What most Protestants believe and teach is that by confessing that Jesus is Lord you are saved,”
Starting with a false statement never leads to a good conclusion...
it is certainly worth your time to know the saving Gospel of Grace that can alone lead you to eternal life.
When you said “it is certainly worth your time to know the saving Gospel of Grace that can alone lead you to eternal life.” I would agree completely. But when you look at your statement there is an important word, “lead”.
Faith can lead you to Grace and Grace can lead you to that Eternal life.