Hi again
I think that for a student to find academic licenses may not be a big problem. But going back to the original question, "Best software to learn"?
That is singular if I understand it correct and I would say it requires some specific information. Some software's are huge in one industry and more or less non-existent in another. Also, are we discussing solvers or pre-post software? I use Femap with Nastran and it would probably be easier to change the Nastran part than the Femap part.
Like I already mentioned, for a new engineer, I think that knowledge in the methods rather than in a specific GUI would be valuable. For a more experienced engineer a company would probably expect knowledge in one or more of the commonly used codes for the particular industry.
My impression is that the OP is at the beginning of a career rather than a more experienced user. So I don't thing he/she should be to hung up on the name of the software but rather on how it works. Of course, if the ambition is to work at company X or a specific industry it is a good idea to find out what software they use.
Good Luck
Thomas