Upgrading from Mojave to Big Sur on Z370 AORUS ultra gaming wifi

So I built this machine 2 years ago, working great so far. But I haven't updated it to the latest OS. I am using Clover bootloader but I've heard OpenCore is better. Should I convert my clover bootloader to OpenCore or do a clean install instead (which I am ok with)

Also, if anyone can help me with their EFI. Here is my hardware:

i7-8700k

Z370 AORUS Ultra gaming wifi

Sapphire nitro+ Rx580

16GB RAM