- PPL
- Flight Experience / Hour Building to 100hrs PIC/150hrs TT
- ATPL GS
- Multi Engine Piston (MEP)
- Multi Engine Instrument Rating (ME-IR)
- Commercial Pilots Licence (CPL)
- Multi Crew Co-operation (MCC)
You can do it that way (as above), you can do your ATPL GS before or after your hour building, or at the same time. But you'll need the 100hrs PIC and 150hrs TT before starting your CPL.
You can also do your CPL before your ME-IR. I think it's safe to say that most people do the CPL before the ME-IR.
There is the advantage of doing your ME-IR before your CPL in that you can do a 55hr ME-IR course followed by a 15hr CPL course (70hrs total) or you can do a 25hr CPL course followed by a 50hr ME-IR course (75hrs total).
Good luck