Seems like we are in the same boat; also 22 working as a senior network admin for my local telco, will be keeping an eye out for other peoples replies, would also enjoy the prospect of working somewhere like Google :)

My current experience says just go with whatever feels right for you at the time, people put too much pressure on the long term plan, basically there is no point in been miserable for a few years hoping that it might open a door later on...

If you do what feels right, in the future it's a lot easier to admit your mistakes (everyone will make them) and people/employers will understand more.

Also a few side projects while your working always help ;)