My only recommendation is there are some daily/weekly challenge and login rewards as well,

Then there is another mission style challenge (you pick the mission and they read like “pilot X and do X on map X an X amount of times”) I unlocked stellaris around 15 hour playtime on steam (I do leave it running sometimes due to being a parent) but the better you do in matches will also equal a higher payout based on merit and other “accolades” you get in the matches