Not sure where to go from here

https://preview.redd.it/tvoz70wksfc91.jpg?width=4000&format=pjpg&auto=webp&s=c64874d5ccb7858267ba642f578c36850f006925

I'm running a think centre m800 small with an i3 6100 no GPU 4g ram. I'm attempting to install Big Sur, I can upload the config.plist, I've followed the guide exactly I'm pretty sure, but it usually stops right after Identified 1 Serial channels at PCI.