I got a new machine for Christmas, and I was also overwhelmed at first. Mine is a Pfaff, so I can't help with the Bernina, but my advice is to get very familiar with the instruction book. Mine helps me a lot. Maybe you could get a more detailed instruction book online?
The advice you have been given so far is good. Take it one small thing at a time, and conquering the bobbin may be step one.
Get it out of the closet and play with it. You can do this.