accreditation question

You are smart to be asking about this.

For general academic accreditation, regional is preferable to national. The proprietary voc/tech schools have created their own accrediting agency, which only accredits proprietary voc/tech schools -- if you ask these schools if they're "accredited," they will say yes, which is a true statement, but that accreditation is not recognized by "regular" colleges and universities, and the classes taken at those schools typically won't transfer into "regular" colleges and unis if/when you want to continue your education.

The other accreditation to be concerned about is nursing-specific accreditation. The two you are looking for are NLNAC and CCNE. Accreditation by one of these two programs is important -- not for licensure, because no state requires graduation from an accredited program to be eligible for licensure, but because most programs to further your education (BSN completion or graduate programs) will require that you be a graduate of an accredited (either NLNAC or CCNE) program, and a growing number of employers are requiring that as well (and some of the most desirable healthcare employers -- the entire VA system, the entire US military, lots of academic medical centers). Just because a school doesn't have NLNAC or CCNE accreditation, that doesn't mean it's a bad school or that you won't get a perfectly good nursing education (the accreditation process is complicated and expensive, and some schools just choose not to do it) -- but the lack of nursing accreditation can cause problems for you later in your career. IMO, there's no point in closing off any future professional opportunities and pathways for yourself this early in the process.

Best wishes for your journey!