Drupal is up and running but how do I ...?

This webpage has a redirect loop

Hi,

I just installed drupal at xxx.com/ab at hosting server.
I changed password of database.
I updated settings.php with new password and set to true $update_free_access = true;
When i go to xxx.com/ab, I get

This webpage has a redirect loop

at URL xxx.com/ab/install.php
I also tried to login in xxx.com/ab/?q=user, i cant.

I am not sure what else to do. Can you help?

Delete Yoast_seo module

I installed Yoast_seo for drupal8, but it adds a string at the bottom of each page. Now I cannot uninstall it because it has "field types in use". I also tried "drush dis Yoast_seo" command, it gives warning that it waits parametr 1 etc. but doesn't disable the module. How can I finally uninstall Yoast_seo?

Security Review module quesiton

so I have installed security review and one of the things it flagged is the webserver can write to all the directories in
sites/all/modules. Ok I see certainly see that as an issue, but it seems Drupal expects the webserver to be able to write into these folders or the available updates page would not be able to install new modules or update the ones you have installed.

so it would appear if I follow the recommendations of security review and make those directories/files read only to the webserver then some of Drupal's built in functionality will no longer work.

Image overlay with fields

Can somebody please give me some suggestions for modules that help me realize this.

I have a photoarchive online and when you select one of the pictures you get the larger version in a Colorbox. I would like the black overlay of the picture to contain things like FiveStar, a tagging option all sorts of editing options. That is not very special and for the individual options I know where to look, but where do I find a recipe for such a page?

Many thanks

Permanent redirect

Hi!
I have just installed Drupal 8 with minimal installation profile. And it always redirects authorized user from the front page to his user account page. Unfortunately I cannot find the way how to solve that issue. With the standard installation profile everything works OK but I do not need all that modules preinstalled.
Please, any help?

Targeting a Specific Drupal Commerce Form with hook_form_alter

Hi, is it possible to target a SPECIFIC Drupal Commerce checkout form with hook_form_alter?

I have 3-5 products on my site and I want one of the products to have completely different fields, styling, etc.

Right now I'm targeting my Drupal Commerce forms with the following:

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