You need to understand the code, I'm using this repo to exchange the script between my comuters.
You need to install selenium via:
npm install
and chromedriver via
npm install chromedriver -g
After that, you have to start chromedriver once via the "just-login.js" to install MetaMask Plugin and to import your wallet into MetaMask.
At the moment I just Upload and do not sell the items.
I think for selling I need a different script, because opensea crashes often.
I tried to get rid of all crashes from the website.