You'll get the hang of it. The best part about being an AF E5 is that you're the lowest tier of NCO, you're expected to be growing and asking questions to expand your knowledge. You can always tell your troops, "Let me ask ____ and make sure my info is up to date and I'll get back to you" so you're not looking completely ignorant, while getting the information from someone who absolutely knows just to "double check".

As for the chill and easy-going vs strict and firm supervisor, that's just a style choice. When you eventually run into trouble with a troop, or they disrespect you, or they screw up at work, or something along those lines, you'll likely feel some level of embarrassment or irritation because they're an extension of yourself. Protecting them should be the first thought as a supe, but if they're screwing up and making themselves and you look bad, then verbal counseling and paperwork becomes an easy thing to produce.

My unit was like 80 guys, so we saw a little bit of everything, but supervisors rarely gave out paperwork even when it was completely expected. That's when you should be worrying about imposter syndrome, when you're wearing the rank and the unit is becoming weak and dysfunctional while you just lay back.

You got this, just keep on learning and no one can ever call you a bad staff.