Redirecting old website to new one

Hi there,
I actually asked this question the other day but was not able to clear my doubt.

I want to know about how I can redirect my entire old website including it’s all posts, tags, and category URLs to my other new website having similar content, tags, and categories using your redirection plugin.
Also, I don’t know anything about technical issues that I will face doing this in the future, I hope that you can assist me in knowing any future issues like wp-admin redirection, how to redirect. I know it will be time-consuming but please help me out.
The old site is: https://myfreeppt.com/
and the new site: https://www.myfreeslides.com/
both of them are established.

You had told to use a regex expression for redirecting old pages to new ones.
I think that you meant to automating the process. But actually I want to manually redirect every old post in my old domain to new domain.