Absolutely agree with your statement! We're under the Grace and not the Law. Here is what Paul said in his letter :
“You are a letter from Christ, the result of our ministry, written not with ink but with the Spirit of the living God,
not on tablets of stone but on tablets of human hearts…. He has made us competent as ministers of a new
covenant—not of the letter but of the Spirit; for the letter kills, but the Spirit gives life” (
2 Cor. 3:3-6).
Peter even scolded people who wanted the gentiles to obey the laws of Moses:
“Now then, why do you try to test God by putting on the necks of the disciples a yoke that neither we nor our fathers have been able to bear? No! We believe it is through the grace of our Lord Jesus that we are saved, just as they are” (Acts 15:10,11)
And an excerpt from Galatians :
"For the entire law is fulfilled in keeping this one command: "Love your neighbor as yourself." (Gal. 5:14)
I think this says it all. Whatever we do as Christians, we have to do out of love and not out of obligation. The Law was an obligation to the Jews, a commandment. In other words, - they had to obey it whether their hearts were in it or not. We're not obligated. Everything has to come from our hearts and out of love. So, if someone wants to give 10%, - very good, and if anyone wants to give 50%, - that's his choice too, because whatever you give - you do it from your heart and out of love!

We're free indeed, in Christ Jesus!
Praise the Lord for His Sacrifice, for us to be free of any bondage!