Changing Address

I’m contemplating changing my WP address from https://www.mademers.com/globalindieauthor to https://www.mademers.com/selfpublishing. It seems easy enough to do BUT:

1. When I change the address, and therefore the permalink, are the addresses to all my blog posts updated automatically? Or do I have to manually update them all?

2. If I place a redirect from the old address to the new, and someone has a individual blog post bookmarked, will the redirect still work or does it only work for the parent site address?

3. If I have links from one blog post to another, do I have to manually update those links or will they change automatically?

Thanks.

[Duplicate: https://www.ads-software.com/support/topic/changing-address?replies=1%5D