If it were me, watching it for the first time, I wouldn't watch any of the supplementary material. Watch the episodes in order and experience it how others would have experienced it back in the day, albeit without the summer hiatuses and pre-emptions!
Despite having favourite series, and not being a particular fan of the later shows (Voyager, Enterprise), we always watch everything in a rewatch. TOS > TNG > DS9 > Voyager > Enterprise > Movies. Even the worst series still have some great episodes.
Anyway, enjoy, you're in for a treat.