I believe there is no "New" Testament, it's a continuation of the "Old", it is all the word of Yah. I do believe that all scripture must agree with itself, so if the old and new contradict each other, there is either a problem with translation, or our understanding. In the case of as you say, we are all Kings and Priests, it does agree with all of scripture.

I have communed as you say while smoking and yes, it is wonderful. But I also believe that we have to ask how does Yah want our worship? Many times we see in Scripture how the Children of Israel were punished because they tried mixing what they thought was acceptable practice of worship and what Yah expects from us. The first example is the Golden Calf incident.

I read Scripture very literally, and if it says don't eat swine, I don't eat swine. But I haven't read anywhere, don't smoke Cannabis when in worship. But I do find an instance where the sons of Aaron came to the Temple to do their job, they came drunk and didn't do the Holy Incense the correct way, and were instantly killed. There are Blessings when we obey and curses or punishment if we do not. He made them an example. I must say, the Children of Israel were a stubborn bunch. I don't want to offend my Abba by being arrogant enough to think I can come to him in my own way. When you love God, you want to obey. What did Jesus say? If you love me, keep my commandments. Don't smoke Cannabis in Worship isn't one of them.