My buddy bought a whole PC last night from Newegg, not a prebuilt

We are wondering what else we need. This is our first time building but not our first time owning, he’s upgrading to a new build after he’s had his and did minor SSD and ram upgrades since 2018 and me as well since 2020. This is the first liquid cooled we are getting into though.

What kind of coolant is best? What else do we need that we might’ve missed? I’ll list the products down below. Yes windows 11 needs to be purchased still.

RAM: CORSAIR Vengeance RGB 32GB (2 x 16GB)

CASE: be quiet! BGW75 PURE BASE 501 Airflow White

MOBO: ASUS ROG STRIX X670E-F GAMING WIFI AMD X670

PSU: be quiet! Pure Power 12 M 1000W ATX 3.0 Power Supply

COOLER: AORUS WATERFORCE II 360 ICE Liquid CPU Cooler, 360mm Radiator with 3x120mm

SSD: Crucial P310 M.2 2280 2TB

CPU: AMD Ryzen 9 7950X

GPU: ASRock Creator Radeon RX 7900 XTX

Edit: slimmed down titles