Start with Strange New Worlds. If you like The Expanse (and I love The Expanse), you’ll like it. It’s gorgeous, it’s brand new, it feels modern, but it’s as Star Trek as the original series.

Then go to Deep Space 9 once you’re used to the water.

Please don’t ban me Lemmy admins, but… you’ll have people tell you to start with TNG. Don’t. It does feel old, heh.