Thank you for showing appreciation! You can press TAB to access the tutorial entries. You probably missed this in the text you can read as the mission loads. There, you will also learn how to exchange items more quickly.
I'm not sure about the Steam Deck, as the UI is optimized for larger computer screens. There will be a management phase where you can put the wounded to rest, hire new recruits, and research droids. There's also a level-up system in the works. I strongly encourage you to visit my Discord Server for more feedback.
Stay safe. o7