Anything I should before adding/replacing my pc's case fans?

Thanks for the advice and help from my previous post, I replaced the motherboard (msi b550m) and upgraded to a new cpu (r5 5600x), and changed to a 700w psu since it was getting pretty old as well (heavy usage since pandemic).

Now I wanted to add or replace my case fans (current fans are the ones that comes with the viking shield vks30), and if there's anything that I need to know since I plan to use the fans I bought meant for my previous build, darkflash c6ms 3 in 1.

What I do know is that the mobo has 3 slots for the fans, hope that helps. Thanks in advaned once again.