TOS is very dated and can be hard to watch at times. You definitely have to be appreciative of the camp and low production.
TNG holds up a bit better. It's not an adventure show though, and the first season has some real stinkers. I'd say it's a good starting point to watch the first 3 or 4 episodes then go to season 2 weeks give that a shot. If you like how it's going then go back and finish S1 and keep going.
DS9 is like tng but also has a bit more edge and does some good deconstruction of the pure optimism of tng. It is still optimistic but also has some cynicism I love it. I don't think I'd like it as much without a good tng backbone though.
Overall 90s trek isn't going to really give you a lot of adventure focus, unless you watch the movies. It's strengths lie in the morality play and the collaborative problem solving, and the idea of a bright future. Picard kind of shits all over that idea of a brighter future but to each their own, I can see why some people would like it.
Where and when in the history of ever has there been consequence-free speech? How is this definition at all useful to you? People have always had the ability to define our own social spaces with rules of conduct, why is this any different just because the social space is online?
I mean if you only enter wanted to write because it would get you writers clout then sure. You can still write to engage in the creative process and make something actually meaningful