If my sins are forgiven, I'm saved. If not, I'm not.
1 John 1 is not on subject.
1st John 1:9 clearly indicates post salvation sin is not forgiven of the sinner at the time of salvation, rather the sin has already been redeemed, man reconciled to God, God’s wrath propitiated, and sin atoned, but forgiveness still occurs in post salvation sin after the sin is committed and only at the time of confession and repentance.
Read 1st John.