Re: Must switch to Ubuntu in a hurry.
You've built your life on Windows software, it's probably not possible for you to completely switch over immediately.
However, with time, you can transition over to Linux.
The only problem I see really is those Access databases. If you keep Windows in a virtual machine or on another computer, with Access, you can still use those legacy databases. For new databases you can use something else that works on Linux.
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.