Piwigo Photo Sharing Site Customization / Tweaks

I am setting up a photo gallery / collaboration site for me to share photos with my family. https://fountain-family.com
Piwigo seems to be the best solution and has most of the features working out of the box. However I need assistance with he following items:

- Hide 'Home' and 'Calendar' icons when not logged in
- Default default image display at 2K resolution to 'Small'
- Set site name and font
- When registering users receive the following an error from PHPMailer.
- On (https://fountain-family.com/gallery/tags.php) Reduce the space between the tag cloud and and the top banner.
- On (https://fountain-family.com/gallery/picture.php) Remove "(mandatory)" from the Comment block.
- Re-order the content blocks under the pictures
- Allow users to login/register with Facebook
- Set user registration to be First.Last name instead of made up username
- Redirect the user to: https://fountain-family.com/gallery/tags.php after login or add tag cloud as a block to home page
- Reduce the space between the tag cloud and the banner on https://fountain-family.com/gallery/tags.php
- Remove "(mandatory)" from the Comment block
- Configure site to read EXIF/XMP info into site tags
- Configure Tags added via website to be written back to file "XMP Keywords"


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