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What are your favorite Board Games?
(hexbear.net)
Tabletop, DnD, board games, and minecraft. Also Animal Crossing.
3rd International Volunteer Brigade (Hexbear gaming discord)
Rules
Astro Knights hits a lot of what you want, and is a very solid game. It's not grand sci-fi, but it is sci-fi. It's a cooperative deckbuilding game about working together to defeat some giant enemy.
I think that both Astro Knights and Astro Knights: Eternity are good, but since you say you're just getting into board games, go for the original, it's definitely more accessible.
I also suggest Spirit Island, but it can definitely be hard to pick up. Quite complex, but definitely worth playing. If you want to, shoot me a DM and I can try and teach you it sometime?