I've never tried because i know for a fact that if i did i'd do it on the first time. Part of me doesn't want it because I'm just going to make one big mistake and get a poltergesit the rest of my life and other half wants to get out and see whats out there.
The problem is I am constantly switching between the two sides due to emotional instability so when my Aries sun does something annoying,self,impulsive,insensitive,etc my cancer moon immediately makes me regret that decision.
But the idea of 'making one mistake and getting a poltergeist' is absurd- I have known dozens of experiencers and not one has had that problem. So one thing is to worry about possibilities (everybody does it) and to worry about anything, even the unlikely. That's another problem that you need to conquer. You can't go through life being worried about things that are extremely unlikely.
when my Aries sun does something annoying,self,impulsive,insensitive,etc my cancer moon immediately makes me regret that decision.
That is also a copout- blaming astrology on your personality is just another way of giving your power away to something you can't change. Many people with 'contradictory' signs can function.
Desert rat is correct- you are assigning blame in a way that makes you continue this way of thinking. There are things you can do if you don't want to continue this way of dealing with life, and not assigning blame.
If you are afraid of projecting stop thinking about it- if you can't, then find something to dedicate yourself to that isn't this- find something that doesn't frighten you, in the material world. Make a decision, and stick to it.
If you decide to do this, then go all the way and do it, but frankly, I don't think you should.