HELP!! Which BSN program? How does licensing work for USA?

so many questions!! nursing help!!!

i cannot seem to find a source that can answer all of my questions! i would appreciate any accurate responses that you are willing to give! i have the following questions;

1.) does it matter which bsn program i pursue? state college vs private college? with the obvious factor (money) aside, is that the only major difference?

2.) if i attend a private college in colorado but would like to keep my current residency, ca, an option to come back to... how does rn-licensing work? if i attend school in co, does each state have a licensing exam?

3.) the nclex... i understand this is the nursing exam. is this the exam one must pass after completion of a bsn program in order to begin practicing?

4.) if i am (eventually) wanting to receive a msn does the school i attend for the bsn influence acceptance at all? i know most of the msn programs are completed online, does this make a difference?

5.) word for word... what is the difference between regionally and nationally accredited?

thank you all for taking the time to help out... my current college counselors do not seem to be knowledgeable on these facts.

take care!! :heartbeat