Learn, learn, learn as much as possible now. Cruise forums, join IAM/BME, learn metal types, etc. Take blood borne pathogens, and cpr/first aid. Go to APP conference and take classes (learn MOAR) and talk to everyone, the person that you talk to for five minutes could later offer you a counter job. You never know.
As for when you talk to shop owners, really know your information. Dress business professional, as you would for any interview, and bring a resume along with you. Say you are looking for a counter job with eventual hopes of an apprenticeship. But it is a long path to even obtain an apprenticeship, usually a year or so of working the front desk first.