Trying to install macOS Sequoia on an early 2015 MacBook Pro

Hi I'm trying to install macOS Sequoia on an early 2015 I got yesterday.

I have basically a clean install of macOS Monetary on it.

I have gotten to the step "install to disk and OpenCore" but I don't get the "Finished building your OpenCore configuration!" (The pop up with a rocket with the phyton logo)

I have never used OpenCore before and I don't know if I'm missing something or doing something wrong.

I will appreciate any help I can get and be pointed to the right place.

I apologize in advance if this has been asked before or having a easy fix