Regarding command time for an ATPL.
These days there are quite a lot of cadets (or trainees) working in the RHS of jets and turboprops in Australia. They are the trailblazers in Australia of a system that has been successful overseas for about thirty to forty years.
If you're just starting out now, the path to command will be well established by the time you get there; you will not be stranded in perpetual right-hand-seat misery! As Parabellum said, you'll have to wait your turn though, and it may take longer than you expect, or think is fair.
Take the career path that best suits your character, aptitude and interests. Then be patient.