Wow you named nearly every game I was gonna recommend! My only addition would be Shadow Empire. It’s a 4x game set on a post apocalyptic planet that is procedural generated. The game has terrible graphics and a brutal learning curve but it’s a blast and has wonderful role-playing elements as well as good strategy.
I wanted Star Citizen to work out so badly. In 2012(ish? I don’t remember exactly) when I first heard of the game I backed it because a space game where you weren’t just your ship but could move around and board other ships sounded like my perfect space game. Now it looks like Starfield may fill that want perfectly. Who knows though maybe one day in the future Star Citizen will actually release.
So on lower hazard levels the game can be pretty easy/slow which gives you plenty of opportunity to learn the ins and outs or to get a warmup mission in. However haz 3 always felt like a good sweet spot where it has challenges but even if you haven’t played in a week you aren’t gonna get toppled. I also wouldn’t consider DRG a game that you would ever need to “practice” to play other than maybe haz 5? But being able to play haz 5 is more about proper loadout and just knowing what to do.