You interpret "not under the law" to mean "do not have to obey the law" whereas it really means "not under the condemnation of the law".
Oh who said we are not, you know love, that thing that doesnt kill , maim, hurt, rape do bad things,
Gal 5:14 For all the law is fulfilled in one word, even in this; Thou shalt love thy neighbour as thyself.
you should try it, but that you cannot do without Jesus, but it seems you have never tasted the new wine, still chasing after the old.
As for teh Sabbath, that is your choice. we rest from our works in Christ,
Mat 11:28 Come unto me, all ye that labour and are heavy laden, and I will give you rest.
Mat 11:29 Take my yoke upon you, and learn of me; for I am meek and lowly in heart: and ye shall find rest unto your souls.
Mat 11:30 For my yoke is easy, and my burden is light.
He cannot help you with what you are doing, it is all your own works.
Heb 3:10 Wherefore I was grieved with that generation, and said, They do alway err in their heart; and they have not known my ways.
Heb 3:11 So I sware in my wrath, They shall not enter into my rest.)
Heb 3:18 And to whom sware he that they should not enter into his rest, but to them that believed not?
Heb 3:19 So we see that they could not enter in because of unbelief.
because
Heb 4:4 For he spake in a certain place of the seventh day on this wise, And God did rest the seventh day from all his works.
Heb 4:5 And in this place again, If they shall enter into my rest.
Heb 4:6 Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:
Heb 4:7 Again, he limiteth a certain day, saying in David, To day, after so long a time; as it is said, To day if ye will hear his voice, harden not your hearts.
Heb 4:8 For if Jesus had given them rest, then would he not afterward have spoken of another day.
Heb 4:9 There remaineth therefore a rest to the people of God.
Heb 4:10 For he that is entered into his rest, he also hath ceased from his own works, as God did from his.
but to those who dont believe they never will enter into His rest, and will continue in there own works.
Joh 14:27 Peace I leave with you, my peace I give unto you: not as the world giveth, give I unto you. Let not your heart be troubled, neither let it be afraid.
the best of all
God bless