Which is the best DDR5 RAM for high-end video editing?

I'm honestly so frustrated right now trying to figure this out. I'm building my first real workstation for 4k video editing because my old laptop just cant handle the files anymore and I'm totally lost on the memory part. Everyone says get ddr5 because its faster but when I look online there are all these different speeds like 5600 or 6000 or even higher and I have no clue if it even matters for editing. My logic was just to buy the one with the biggest number because bigger is better right?? But then I saw people talking about cl30 or cl40 and something about stability and now I'm worried if I buy the wrong thing itll just crash while I'm trying to render.

Im in Chicago and I need to get this whole thing running by next Friday because I have a big wedding video project due for a client and my current setup is literally smoking. I have about 400 bucks to spend just on the ram sticks but I dont want to waste it on something that doesnt actually make my computer faster for Premiere or After Effects. Is 64gb enough or do I need 128? I heard ddr5 gets weird if you use four sticks instead of two? I just want the smoothest experience without the screen freezing every five minutes. sorry if these are dumb questions I just have no idea what im doing...