I agree with the remarks of the above poster. I have a bachelors also and chose the ADN route (or ASN but ours was called ADN.) I am qualified now to go straight into a Masters program if I so desire because I have all the undergrad required courses already. The only advantage of getting a BSN would be if all the hospitals required a BSN as a new grad upon hire, but that is not true. Some hire ADN along with BSN new grads, you have to look for the jobs.
Regarding your second question, yes! Work and see if you like this kind of work before you commit 2-4 years of schooling to it. Also, work as a tech or CNA during school. The people in my class who worked as tech's/CNA's were the only ones hired on the first round. Hospitals are picky. However, this isn't a hard and fast rule, as the above poster said of herself. But it does really help to have a work history with a hospital and then to get hired by them once you are licensed.
Lastly, I would stay away from anything accelerated. Accelerated BSN or direct entry Masters. JMO. There is so much material and clinical time that I cannot imagine you wanting to accelerate. I graduated with honors, highest of my class, and am glad my semesters allowed me to spend extra time at the hospital or with my instructor or study group. Plus if you want to work, it may just cripple you. Also, I have seen some people graduate with a Masters who have absolutely no hospital experience. And this is not taken well by others in the field. Keep that in mind. And one last thought, I know that UIC direct entry Masters requires you to claim your field upon application. IE you need to apply to family nurse practitioner when submitting your application. There are 2 problems with this: if there is not room in the family nurse practitioner program to accept all the applicants, then you have to wait another whole term/year until a slot opens up in THAT field. You can't reapply for a different field, say one that does have slots open. Secondly, you are claiming a specialization even before you have started any nursing classes, before you have been on any clinical rotation, so how can you possibly for sure know that THIS is the best route for you?
I interviewed with UIC direct entry Masters and my head just said "*****" Makes no sense. Again, JMO, but I think they are capitalizing on those people are career switchers. People who already have a bachelors, or a masters in one field. These people are trained to believe that credentials and MA, MBA or what have you behind their names will open doors and accelerate their career. That mya work in business, but nursing is different. You really need the floor experience and direct patient care before anyone is going to award you the responsibility of working at a higher pay level.
Just my 2 cents. Go into the nursing profession smart, well prepared, and proud of your choices. Be certain of your skills first and always, and the doors will open for you.