Help with moving from blogger with new domain name

I am really struggling trying to find out information as to how to finish off my move from blogger. I have searched this wordpress forum and can’t find exactly what the answer is. I hope someone will help.

My old blogger was at mysite.com/blog/mysite.html

My wordpress is at newmysite.com/blog

So I have also changed domain names (not real above btw)

I have done a 301 redirect Redirect 301 /blog/mysite.html https://mynewsite.com/

This all works OK, but I can’t get my head round how to get the redirect of all the archived folders to redirect and show correctly. At the moment calling them shows them on the old server.

Hope I have explained well enough. I would be grateful for some help on this one. Thanks