Hi Spfreezes,
I would say, just do it.
Two years ago I was feeling like you guys, you know did not have any trust in myself or others, did not think I was worth anything, you know the whole pack.
In September 2006, I was asked by the owner of the igaming site, I had been a moderator on for about 2 ½ years, if I would be interested in a job in Malta. He was planning to start a new project there. First I was quite affraid to go, because I would not know anyone there and I would be have to live on my own. But my thoughts should not decide the way I live my life, so I decided to go.
I lived there 2 years (I am in talks with another company to move there again from next year) and I have never in my life had such a great experience. In the 2 years I lived there, I have never got so many friends, gone to so many social gatherings etc. It was really a self esteem boost big time and it got me so many social tools.
So if you think you can do, I would say go for it. I know mine was a job and yours is education but it is very similar.
I hope my story could help a little.