Hi A,
I have read your thoughts about new people getting confused which software to use, if they want to start designing things in 2D or 3D.
There are so many CAD software out there and I agree that people gets confused when they think about which program to start with.
First of all, I would recommend to think what kind of results you want to achieve. Is it concept art for games or movies, is it architectural visualizations, is it 2D/3D assets for games, etc.
Every software has it's own pros and cons. I would recommend to try to find out how professionals achieve particular results and try to read some information why they recommend particular software.
That would be a good way to start.
Good luck!