I don't think it would be a problem, since the charges were dropped, but check with the CA board of nursing before you begin school to double check.
LPN & LVN are the same thing- some areas of the country use LPN, others use LVN- it all depends on your geography.
I don't think studying for NCLEX before you even begin school is necessary- most of it will not make much sense to you anyways because you haven't learned it yet.