Hello,
Best wishes for success on your Level III exam. My advice to you about software is to master Excel. If you have never learned to program a computer then you should learn a programming language, probably Visual Basic. It is very difficult to access platforms like Bloomberg, Factset, Capital IQ, and so on. But if you have the ability to learn these platforms then this is also useful for the beginnings of your career.
Yours, in service,
Jason