Redirecting posts issues

so I currently have my site drpierresblog.com and want to redirect the post I have to drberrypierre.com

what would I put in the source url?
for example
https://www.drpierresblog.com/why-amazon-doesnt-think-health-care-is-any-good/

to go to
https://www.drberrypierre.com/podcasts/why-amazon-doesnt-think-health-care-is-any-good

how to do I add the /podcasts/

Also same issue if I wanted to go from

https://www.drpierresblog.com/why-its-always-important-to-ask-even-if-you-think-you-know/

to

https://www.drberrypierre.com/why-its-always-important-to-ask-even-if-you-think-you-know

what do I do