What ram should i get?

Im stupid

I bought all the parts for my pc but accidentally bought an ddr4 ram. ( the price was too good to be true)

I have an b650 msi gaming plus wifi gigabyte 6800 rx ryzen 5 7600

The prices are insane but i really want this pc , corsair was 440 and trident 399 i want to ge the most out of it because i want to play for a while and not tweak and upgrade in the upcoming future.