What/how does one worship or live with that type of religion? I have no idea. Just really sincerely wanting to know.
There are no inherent worship, prayers, rituals or special costumes. It just is.
When it comes to the Left Hand Path, you can practice ritual magick, meditation, yoga, etc. Whatever you believe will help you reach whatever goal you may have for yourself. But it's up to you. You are the personal god of your life, and it's all about your personal transformation.
Since I'm a Luciferian, I personally have a liking for various Pagan deities and concepts. I view them more as archetypes, though. No god has ever personally appeared to me, so I have no reason to believe in literal personal gods. That may change, though. We'll see.