Kenny,
There are 2 schools at Cumbernauld; did you get a look at both? I works with ACS Flight Training at Perth who conduct the full Commercial Training Program.
I agree with 'Dan' - one step at a time before looking at CPL fully.....but worth looking at future options. Air Service Training at Perth Airport are currently the only Scottish option for the commercial ground school - although many look at Distance Learning.
I suggest a '30 minute trial lesson' at each site. All hours flown will count and at least you will then have a REAL insight and be able to make a good decision. Make sure you let them know you intend to complete a course and it is not only for a taster.
Allan