I'm sure NA is similar to AA, in that all it takes to consider yourself as welcome to be there as ANYONE else ... is the 'desire' to get FREE.
However, that desire can get eclipsed by ... opinions of others, personality conflicts, self-importance, self-righteousness, lack of being willing to submit to the program, lack of diving into the program ...
take the initiative and do web searches for Recovery Speakers (AA & NA), recovery resources, online workshops, etc. However, be assured the naysayers are out there too.
I easily dismiss the naysayers, because they did NOT get me FREE.
RDBplus3 ... Happy, Joyous and FREE ... and I KNOW U Can B 2