What you are saying is simply not true, because what you are implying is this, "since I cannot tithe, since there are no priests, then I am not obligated to obey the entire Torah, for it is all or nothing", which is "lawlessness", which is discarding the entire Torah, "torahlessness". The entire Torah is indeed still binding, but under the new covenant certain matters of Torah are fulfilled differently than under the old covenant, such as the requirement to kill the Passover lamb every year. Under the new covenant we already have a Passover lamb that was killed, and it is the Messiah, therefore we are not required to kill lambs every year, because we fulfill that requirement of the Torah through the Messiah. This is why Paul said, "let no one judge you by food, drink, feast, new moon, or shabbath, for these are all foreshadows of realities in the Messiah" and also why it is written, "for when there is a change in priesthood there must also be a change in the Torah". And it is through this understanding that we obey the entire Torah, but differently under the new covenant. You see me wearing tzitzit, but I eat pork, which may seem contradictory or as torahlessness, but under the new covenant certain matters of Torah have changed, such as the matter of food, which goes back to what Noah was told, "everything that moves shall be food for you", meaning clean and unclean. Abstaining from eating pork under the old covenant of Moses foreshadowed a greater reality, abstaining from friendships with unbelievers, who according to the scriptures, are considering pigs, hence "do not throw your pearls to pigs". But many people, such as yourself, take these examples in the new testament of matters of the Torah that are no longer required to be observed under the new covenant to mean that the entire Torah has been done away, which is a great error, and go into the extreme of torahlessness, which is worse than disbelief. This is why the Messiah said, "I did not come to abolish the Torah" and will say to many believers, "depart from me, you workers of torahlessness".