Not at all.
The law says rest on the sabbath.
The Christian does good works on the sabbath.
The Christian fulfills the law of the sabbath by doing good works 7 days a week.
(The Christian does good works not in order to get saved, but because they are saved.)
I agree with the 'good works....and because we are saved !
But we are to do more than 'rest on the Sabbath....we are to 'remember the Sabbath to keep it holy, and to 'assemble before God (to be instructed by HIM) Lev 23. It's a special time/appointment set aside for intimate communication with His own people who hold dear what is holy to God. Any other time you assemble before MEN from whom you HEAR 'about God 'secondhand !
I have already quoted Lev 10v10 once today !
If you are God's own like you say, you will be happy not only to DO what God says but 'go the extra mile ! Creation is 'ongoing and we are expected to move ahead with it-until we are perfect....the 7 days are not up yet !