I need help to start the Big Sur installer

I tried several times to make the installer to boot Big Sur internet recovery installed on my usb stick following dortania's guide but when i boot into opencore and select the usb i get a black screen. After 30 seconds it shows the verbose and it stops at [EB|#LOG:EXITBS:START]... i followed dortania's advices to get past of this error but i literally can't. Thanks in advance.

Configuration: -i7 3770 ivy bridge 3.4ghz -msi gaming-x rx480 4gb -intel dh67bl latest bios -12gb ram 1333mhz -465gb samsung 860evo ssd -256gb samsung 850evo ssd

submitted by /u/Rizzo_GR
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