I should have said this first so please forgive me. Welcome to CC deacon_mo
One thing we must understand about the difference between "religions" and Christianity is the difference between man and God. If you happen to research many of the main religions of the world you will notice that they are very "man centered". True Christianity on the other hand is only God centered. Religion can be defined as man reaching to God. Christianity is God reaching to man.
You mention in your OP about all these "new religions" that are "popping up". Notice how they are all centered on man. Some even call themselves "Christian" but they will then say we don't like what the Bible says about "this and that" so we will forget about those things. We will only use what we like and call ourselves christian because we use the Bible to justify ourselves.
True Christianity does not throw out any of the Bible but takes it all as God's Word as truth and trusts God for understanding. Religions take what they "like" and disregard the rest because the hard sayings don't make them "feel good".
You also mention the name used for God, Yahweh, and think it is some "new thing". No worries. This derives from the Hebrew consonants "YHWH" and is translated "Lord" in English versions of the Bible. This has also been translated as "JHVH" which is where "Jehovah" comes from. A real cool study you might be interested in would be "the names of God" which, as others have mentioned, yields many other names of God.
God bless you brother as you grow closer to God just as myself and many others here are doing.