How to create a new Apple ID

Please try to only ask one main question per topic. Asking two completely different ones can result in a very confusing mixture of replies.

Read this support article to learn how to use Shared Albums in Photos on your iPhone, iPad, and Mac: How to use Shared Albums in Photos on your iPhone, iPad, and Mac - Apple Support

Read this support article about Apple ID Frequently Asked Questions --> https://appleid.apple.com/faq

"How many Apple IDs do I need?

Just one. Use the same Apple ID everywhere you sign in to ensure that all your Apple services and devices work together seamlessly and you can access your personal content from all your devices."

If you need to make an ID in addition to the one you are using to post here, this article explains how to create a new Apple ID (create an Apple Account) --> How to create a new Apple ID - Apple Support