Very helpful to suggest a new watcher to cherry pick from all the shows.

If you want to do it chronologically, start with TOS, TAS and their movies.

If you don’t care for the old style of acting and storytelling, start with TNG. Though the first two seasons can be a bit rough at times, the show finds its stride around the time riker grows a beard.

The two TNG spinoffs DS9 and VOY are also great, though voyager has a little less memorable characters than the other shows (with two obvious exceptions I don’t want to spoil).

When you have watched those three, you could delve into nutrek as well (discovery, Picard, strange new worlds, lower decks). Those are essentially modern Trek, which will feel a bit different, but most of them make reference to the TNG era and it is nice to have watched that already to get those.

Oh so we just gonna act like Enterprise wasn't a thing now huh?