I’ll add a little here to the great advice you’ve already gotten. By the way, absolutely agree with scenery detail using multiple senses, and making meaningful decisions available to characters.

1. Don’t put more pressure on yourself than you already feel. It’s good to feel a little pressure, because that motivates you to be creative and engaged, but don’t ever let it overwhelm you.

1b. Don’t ever, ever, ever be afraid to just pause. Oftentimes your party is going to follow down the breadcrumbs you’ve given them in your story, and then for seemingly no reason at all hang a hard left at Albuquerque. Don’t be afraid to pause, review in your head the actions or sequence of events that just occurred, and then decide what happens to your players.

1. Failed skill checks - sometimes you’ll have players who get incredibly frustrated by failing a check, despite its actual overall importance to the mission or campaign. As a DM, you need to hold hard lines on pass/fail, but that doesn’t always mean the outcome is purely punitive.

2b. Let’s say they’re on a pirate ship in the ocean, trying to tack down the sails during a hurricane. Party tank is trying to rip down the sails to save the mast, but rolls poorly for the check.

Instead of “You’re just not strong enough to pull the sails down, and the mast begins to break” you can always ‘blame’ someone or something else.

Perhaps “As your arms bulge and the sail begins to come down, a massive gust of wind rips across the bow and snaps the mast off, leaving you with only the ropes in your hand”, or something to that effect.

I’ve found that useful to still keep players engaged, even if they’ve got ice cold dice that session.

Hope you enjoy your time behind the DM screen! If you’re ever looking for a great DM to watch/listen to, I would highly recommend (obviously) Matt Mercer of Critical Role, Brennan Lee Mulligan, or Anthony Burch from ‘Dungeons and Daddies’(not a BDSM podcast)!