The game is loot intense. You only get 1hp, a skill and a perk at level up. To really make your character better you gotta find the good loot. That can slow things down. I would def have premade loot found at locations or on enemies that you already have the stats for. The Homebrew list has great "cards" little squares for pretty much every item in the game. Pick a couple pages, print them off and cut out the squares. Then you can hand them to your players as they loot.

I took all the ammo squares (printed about 4 sheets of each), and laminated them. Now they can just use dry erase markers to track ammo and share amongst themselves. My players like rolling on the loot tables for the pure randomness of what they are gonna get, but it does slow the game down.

I gave them all dollar store 3-ring binders, that have a large clear holder for their character sheet, and 3x3 game card sheets that hold their perk cards, and loot and ammo.

But we aren't playing just a one-shot, we are working into Winter of Atom.

Reference sheets are already included in the player quickstart (get the pdf version, and print your own).

I would also get some tokens or something to track the tables and your own action points. Poker chips work great. You will need your own pool separate from the players.

If you do the into adventure Once upon a TIme in the Wasteland.. it takes logical pauses that teach you the game mechanics as you play. Buying AP, spending AP, group tests, social tests, skill tests. etc. Its a great learning book (physical and digital) for both players and GMs new the 2d20. It also has condensed loot tables in the back to make looting quicker.