i can’t get rid of /author/ in the middle

A quick search on Google gave me this, https://stackoverflow.com/questions/22115103/how-to-remove-author-base-in-wordpress/22298759.

I’ve not tested it, but you can give it a try.

thanks for the response, i have done a lot of research but i couldn’t find that.
but i don’t want to modify coding, if i do something wrong or encounter a complication, i don’t know how to fix it.

Sorry. There are other plugins out there that will remove the author base for you thought.