Ransomware Help

Hey Guys, so I downloaded a mod for a game and when it ran on Friday nothing happened, Saturday I booted up my pc and noticed my screen went black for 30 sec and Mouse started to move on its own. I then received a discord message from a user, he gifted himself nitro using my account.

I shut down my computer and unplugged my lan. I got messages from discord on my phone, the man was asking for cryptocurrency or he would brick my computer, said the hack was in my motherboard.

I downloaded a new bios file on a separate pc and flashed my infected pcs bios, I then logged in offline and wiped my computer to a new boot.

Next on a separate device I changed all passwords for emails, banking, ccs, etc. I froze my credit and contacted my internet provider. They guided me through the steps of changing my IP and my internet details.

I was wondering what other things I should be doing. This is a scary time, thank you.