The Guild currently has around 6 apprentices and 30 journeyworkers (status of some is still pending). Right now the Guild is only accepting apprentices that are working under a registered journeyworker, so that means you have to get the job before becoming an apprentice, and hence that determines the location.
Everyone in the Guild, I believe, supports the program, but the current employment difficulties in the construction industry limit the opportunities.
First thing, of course, is to join the Guild if you haven't already done so. Then attend a Guild event and take a workshop or two, and through networking, get to know enough people involved in the program to work your way into a job position under a journeyworker.