Does this basically summarize the Christian salvation message?

That about summarizes the highlights of the central theme.But you left out that in order to appease this God you must behave with a self righteous attitude and tell everyone how they are sinners that are going to Hell if they don't change their ways and even if they accept this Jesus fellow they still must not do anything that they interpret from their book as a sin.Because, apparently, even if you accept this Jesus dude, you still must appease this God person and they gladly will tell you how to do that in order to get a few extra points for good behavior.