As we begin this chapter, it should be remembered in the previous two verses that Peter was just saying that it would be better for people not to have know the way of righteousness, than to have know them and turned away and rejected Torah (2 Peter 2:21-22).
Peter says there are false prophets who arose among the people. I do not think Peter is prophesying of something new here. It is likely that he is speaking of the false teachers spoken of by Messiah (Matt. 7:15-23).
Peter calls himself a bond-servant and apostle (missionary) of Yeshua Messiah. He tells us to whom he is writing. He is writing to those who “have received a faithfulness of the same kind as ours by the righteousness of our Elohim and and Savior, Yeshua Messiah.”
Humble yourselves, therefore, under the mighty hand of God, that He may exalt you at the proper time
Those who ignore His Torah will give an account to Him.
Peter explicitly states that water baptism is NOT what saves us. It is our association with Messiah through which the Spirit (Breath of the Father) dwells within us (good conscience) that is our salvation.
We are redeemed with the precious blood of Messiah. Therefore, we are to act like it.
Peter appears to address a variety of issues in his two short letters. However, his consistent mission was obvious. He is teaching the Torah and messages from the Tanakh.