I think you are a little confused to an extent here, because the reason the Law (Mosaic law) brings us to Christ is our failure to keep it and thus points out our sinful behaviors. Thus showing us a need for a Savior to help us overcome this wretched way of life.
It is our failure by ourselves to keep the written ordinances that leads us to needing the Lord !!!
Once a person has come to the Lord Jesus Christ, His commandments to love encompasses all else and makes the walk easier and burden light. Because of instead of focusing on trying to keep over 600 ordinances, that is impossible to do, we only have to focus in walking in love.
That love in turn will establish (Romans 3:31) and uphold (Romans 13:9-10) those commands in the faith, not void them !!!
The Holy Spirit will guide is in keeping His commands and walking according to the teachings of Christ, He does not bring a different set of teachings to go by then what the Lord already gave. Neither did Apostle Paul !!!
You can't perform the command to Love any easier than you could perform any of the other commands.
You are purposely confusing the Law with coming to Christ.
You know that the Law says Love God and Love your neighbor. So you are double minded.
So, in effect, you are saying we failed at the law so we needed someone to condense it for us so we could really follow it.
Nope. Our Rest in Christ is Real Rest.
Through the Holy Spirit, our New Heart and our New Faith in Him Alone.
Have you noticed that one of the fruit of the Spirit is Love? That's a gift from God. Rest.
We are given the Gift of Love when we come to Christ. Not a new command, and therefore condemnation when/if we don't measure up to His Perfect Love.