Voyager's got that family feel with the cast that you just enjoy being around.
TNG is best to start after season 1. Not saying season one is bad, but it might be harder to get into for a new comer.
Enterprise is good is you like your uniforms tight.
The original series is great to get a lot of the origin information. I guess it's hard for new comers, but I grew up with it, so has a special accepting place in my heart.
Deep Space 9 is my personal favorite for political sci-fi. However, there is the occasional whatever episode. This is best to watch is order all the way through.
I still think that lower decks and strange new worlds can not be fully enjoyed without some other older trek shown under your belt, but it's only a few episodes so you can finish them both quickly.
I abandoned Discovery after season 2 or 3 (I forget) I hear it got ok later on, but idk.
Picard, just watch season 3. I watched the others and then season 3 came out. I forgot about the others.