How would one go about choosing an appropriate Tech Instructor? & what courses should we start with (to avoid duplication due to lack of funds)?

Everyone has a different diving style and although we may all be good divers, some people just don't get along underwater. Is there a "try me" dive? to avoid signing up for a bunch of courses only to realize by the 3rd dive that you really don't get along underwater? & would you want to take Tech courses from someone you don't know personally and are already comfortable in the water with?