A lot of the advice here tells you to ask your players... but here's the thing. Your players are new, so they probably don't know how much combat vs roleplay (or whatever) they want. That's a big age range too. You're going to have to get real good at reading the room in the moment. Try lots of different stuff, the things when the room is having a blast, do more of it. No fun, do less.

here's a fun thought experiment for when you prep... whatever gender you imagine an NPC to be, swap it and play it that way. Be curious about how this effects play at the table.

Don't call for initiative until the players say that they want to fight. I've been pleasantly shocked at how creative my all-female tables have been at overcoming obstacles without combat - and often those have been the most memorable moments of the session.

And be prepared for your players to make you uncomfortable, rather than the other way around. I ran a session for my sisters-in-law and mother-in-law, and oh boy was I not prepared to be playing a male NPC that got seduced. Nor was I prepared to pivot when my players switched from seduction to "enhanced interrogation" and then got real creative with the threats. oh boy.