Guimaraes,
Don't know what a "enrolled,subscribed ATPL*" is, but if you are going for a job as an FO, then you will need
a) CPL
b) Multi Engine IR
c) MCC
If you are going for a job as a Captain you need
a) ATPL
To go from a CPL with Multi Engine IR and MCC to obtaining a ATPL you need the following
1500 Hours Total Time
500 Hours Multi Crew
100 Hours Night
75 Hours Instrument Time
250 Hours PIC (including 150 hours Co Pilot PICUS)
200 Hours Cross Country (including 100 hours Co Pilot PICUS)
You will also need to have passed all of the ATPL Theory exams
And finally, for the licence to be issued, you must have passed an ATPL skills test. This is either an LST or LPC on a multi crew aircraft.
As to how you get that experience, everyone does this as a co-pilot or first officer.