I think it boils down to what kind of TV you want to watch in general, because almost all Star Trek is good Star Trek, but the shows are very much products of their time

So, do you want 60s adventure of the week where you really get into the origins of the franchise? -> Original Series seasons 1-2

80s/90s vision of a future where we have really learnt to better ourselves? -> The Next Generation Season 3 onwards (and any highly rated season 1 or 2 episodes)

A new take on Star Trek that keeps the hope and adventure, with modern special effects and episodes still in production / coming out? -> Strange New Worlds starting at the very beginning

The other shows are good too, but for someone specifically looking for a hopeful iteration of Star Trek, I’d recommend the above three