Hello community,
Hope you are all doing well. WordPress beginner here, and I need help and suggestions.

I created a blogging website for my friend to polish up my skills but I realise every WordPress website has the same URL for admin page. And I would like to change it for security reasons.

So need some help, is there any good free plugin i can use?
or
Is there any other way which i can change the url.?
And what are the things that can happen if I change the URL? like pros and cons?