@stingjay you clearly did not read the message that is on top of every single page of this forum:
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first
We have good docs here: https://retropie.org.uk/docs/
I am really amazed with how easily we can set a retrogaming machine on a cheap board and completely with a free software.