Santa Monica, California, USA
Hi Kith! The explication of your question is a sequence of non-sequitors, but I think I understand what you are asking: Do you need a teacher?
From your Christian point of view, you're missing a big beat. Jesus was a teacher. He had students. Still has them today.
No matter where one is coming from, everyone needs teachers, and it's a life long process. It's how insight and information is passed on. And, when you learn something of value, you can share it. That is, teach.
It is youthful arrogance (this is not derogatory or personal, youths are arrogant, that's part of their job) to presume that because you have free will, you either know it all already or can make it up as you go.
Here's the tough part: It's important to choose your teachers carefully. Use your sniff test. If it smells like fish, it's probably fishy.
Be open to what comes along. I found a life-coach who was stocking shelves in my favorite grocery store. Be aware also, that, as teachers hope, you can outgrow them and move on. Spiritual guidance is a process, not an event.
Opening a door is just opening a door, and, if you're not a sheep, it doesn't have to influence anything. Use your head and evaluate, evaluate! Don't get caught up in anybody's notions until you find some that work in the world.
It may seem a bit contradictoy, but it is possible to be open and discriminating at the same time. In fact, that's about all we got going for us.