Hi there Cath,
I fully understand your fear...its a topic that has been spoken about countless times on the forums but what you are heading towards is something that will truly change your life for the better. See it as a holiday, remember how excited we get when looking forward to a holiday, a break away from the mundane, the familiar, the same old faces and places?
The Camino will test you for sure and the bad days where you have a blister or aching legs to the point of tears are the days you'll look back on and chuckle.
These are also the days where the real transformation takes place, when you are fully out of the comfort zone and fending for yourself, you learn, you grow and you conquer.
The guys are right when they say you will meet people. I got on a bus alone in Biarittz heading to St Jean Pied de port to start my camino, there were five others. We walked together every day for the next 10 bonding, laughing, singing, crying together.
The people are what makes it for me and in the summer time there are plenty of friendships just waiting to be made.
Do little things to ease your worry.
Learn a little Spanish to allow you to converse in basic phrases.
Watch 'The Way' film to get a feel of the scenery and friendships.
Pack tremendously light, 'over the top' light to feel free with what you have on your back.
And also....a question for you....is there any way, any way at all that you could get enough time from 'commitments' to walk the whole route to eliminate the uncertainty of where to start, how much to walk.
I pondered this on my first Camino and in the end got fed up with trying to decide which parts to cut out so just told my boss that im away for 36 days, Ill take what holiday I have, take unpaid leave and work overtime when im home if i need...he understood. Besides, if you miss a week of the Camino, I assure you you'll be heading back sometime to finish it
Try not to get caught up in the minor details of it all, plans change all the time so flexibility is important. Rushing for a deadline is just like being at home, try and make the camino a start of a new way of living.