I coach high school softball and I know what it's like to have someone on the bench you have to send up to bat and put in the field knowing the results are going to be awful.
Well it's really not exactly like this. Certainly there is some sense of competition but there is also willingness among players to help other players progress and improve their game.
The Metaverse is not for people to prove how much "better" they are than others because that's really a no-win strategy. In the end this is a single player game and the metaverse is merely a high score list. The only true winners are those that progress and improve in the game. And those that do so are winners regardless of what their current rank and difficulty level happens to be.
In any case there certainly is no pressure to join an empire or to post games to the metaverse. The only thing that you need to do is ensure that however you decide to play the game is fun for you, because if it isn't fun then you're really not going to stick with it.
This is a very complex game to master that has many different ways to win and many subtle variations on those many different ways. Any advice that anyone gives you will be of a general guideline variety but the devil is in the subtle details like how to balance colonizing as many planets as possible with being able to develop them.
This is only the tip of the iceberg and the best someone can do is give you a pointer here and an example there, but you will have to take those pointers and examples and incorporate those that fit into your current knowledge of the game and the stlye that you've developed. There will be many things that you won't get at first and won't work for you however a few months later after you've developed your game futher something will click and now you will be able to use them.
Joining an empire is one way but you can ask for advice here and get as good advice as any you'd get in any empire. There really are no "secrets" in this game but there are so many different ways to play.
Anyway the basis of metaverse scores are the scores your get in the game so these two topics are not all that different. Although there are some specifics to how cumulative metaverse scores work the following does have some pretty specific detail about the scoring of an individual game. See the
Basic Metaverse scoring questions thread.
Also there's stuff like this scattered all over these forums that a little bit of searching will reveal.