With all due respect, in what sense is this an authorized meeting of the totality in a locality of all the regenerated individual disciple-believers summoned together—assembled, congregated—for the teaching and watchfully preserving without change whatsoever He has commanded?
The old testament is about God’s relationship with a nation called Israel. The new testament is about Jesus relationship with me, personally.
I don't think so. The New Covenant is about Christ's relationship is with His Bride, the church, of which you are a member. Is your membership vested in a local, autonomous Biblical church? That is the only organism with members ordained to congregate for teaching and preserving the commandments of Christ (Mt. 28:20a), and for the observation of the Lord's Remembrance Supper (Lk. 22:17-29, 1 Cor. 11:24-26), AFIK.
The impression I get is that the conduct of the rite of communion outside the assembly of the brethren only on your say-so is not the plan or context provided by the Lord's example for it. I am not of the RCC convincement, but I do believe in membership in the local independent church governed by a plurality of spiritual elders as the plan through which the Holy Ghost works into the individual's life.
Take care, bro.