. What does it mean that we are free from sin?

The Messiah’s life frees or saves us from the Law of Sin. Therefore the Law of Sin should not reign in our lives and we should not obey it as we did before we were saved from sin. We should held our member as instruments of righteousness unto YHWH.
Romans 6:11-13 (KJV) 11 Likewise reckon ye also yourselves to be dead indeed unto sin, but alive unto God through Jesus Christ our Lord. 12 Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof. 13 Neither yield ye your members as instruments of unrighteousness unto sin: but yield yourselves unto God, as those that are alive from the dead, and your members as instruments of righteousness unto God.
Now we should be obeying the Law of YHWH which is righteousness or right doing. This proves we are not under the Law of Sin and Death.