A good thing to do is to jumpstart the PSU and test the AIO before installing it into the case and checking for leaks under pressure. I personally would’ve went with a Corsair AIO to use with iCUE, since you also have Corsair fans.

Also, add the Velcro straps to the cable area and add each component individually, and strap them in as you go, it’ll save you from making a mess of the cables.

Finally, don’t let that tempered glass touch tile/granite, etc. Handle the side panels with extra care. I use gloves to prevent oily residue touching the glass, and I lay a towel down so when I remove the panel it doesn’t collide with a hard surface and bust.