Hi! I just got accepted to an accelerated second-degree MSN program that starts in the fall and I thought I would share my opinion with you..
My bachelor's degree was in Criminal Justice and after my internship, I was in the same boat as you--I knew I would not enjoy being a lawyer. So, I decided to pursue my first love of nursing, now that I'm older and wiser and more dedicated. Having several years experience working in accounting is NOT going to help you get into a program. It might help you financially, or to realize even further that you don't want to pursue it, but my advice would be to focus all your time and energy into these pre-requisites. You can no longer change your undergrad GPA, but you do control the outcome of these pre-requisite grades...
Almost all of the accelerated second-degree programs weigh the pre-reqs the most (Anatomy, Physiology, Microbiology, Chem., etc.). I took a year and a half to complete all of them, taking one each semester. I wanted to take my time and do well, and I succeeded doing that (4.0 pre-reqs). Working full time and taking classes is hard. Because of the competitiveness of applying to these programs, you almost can't afford to get a "B" in any one of them.
You are the only one who knows what you are capable of.. I worked part-time as a cocktail waitress and focused on the pre-reqs and it worked. It did not matter where I worked before because in reality, everyone will be "starting over." Others in my classes who tried to work full time, ended up not doing as well, and ultimately they didn't get into the program
My advice, take your time. Accept a position that will allow you to study hard, learn the material, and get a good grade.