You might be able to follow the thread above to achieve a solution.
Also, if you’re serious about becoming a stake pool operator, I strongly recommend spending some time here and there reviewing Linux tutorials - it doesn’t come overnight but it certainly does come
The big takeaway from the link I posted above is you can use the pwd command to identify the full path of whatever working directory you are in - so if you navigate to where your config files are, just type pwd to identify the full path to those files
You could join the Cardano Shelley & Stakepool Best Practice Workgroup on Telegram, there is a lot of info and you can search on tags from the errors you are getting. I got a lot of info out of that chat.
Don’t give up