Post installation

So I had to start from scratch to get my site running with drupal 10.

I want a front page slideshow which is integrated in this theme with flexslider.
Only the default is set to five images and I only want to use three images.

The theme places it in a block in the home page where I can't view the html source.

I just want to remove this bit in the source, when I right click and view source of the homepage when I'm out of the administration pages.

I was recently told that clean URLs are "better" than node paths but wasn't told why. The site I work on is multi-language, making it far easier to remember and paste a node path (https://example.com/es/node/1) than a URL pathway (https://example.com/es/blah-blah-blah-blah).

Node paths also makes the HTML far easier to write when directing users (eg "View this page in English | Spanish"). 

My organization's website is built with Drupal. As content managers, we would like to have more freedom to edit things, like being able to change the main navigation menu. The way that the agency who built this website years ago set it up, leaves us very limited with these types of changes. For example, I cannot update our new office address on the footer or do the connection with Google Analytics.

I am using the Catalog+ theme.

When people login, they don't see the Edit options even though they can edit the content with the Pen option (Contexual links)

I prefer if they can see the menu that shows View|Edit|Delete|Revisions

Which permission setting will enable that menu access.

I googled and couldn't find an answer.
 

How can I add fields to the user registration form, example, I want to add a company field.
 

I have a list of terms, they are locations for pilates classes.

I have lots of Commerce Core products with a term reference to reference the location of the classes.

Each term page has a description and image.

I've created a views block which currently lists all products.

How can I set a contextual filter so the products referencing the correct terms only show on the term page.

I've tried so many different filters available but cannot work out how to do it.