Module development and code questions

Drupal 8x 

I am using workflow moderation to send emails within publishing workflow at various states (draft , publish etc). 

New requirements:-

Introduce 3 new fields,

                    1. "Send Email"(checkbox) within the content type .

                     2. "Email Content"

                    3.  "Email to"

Hi guys, I've been banging my head on this trying to find a solution, searching all around for something that would work, but I got no chance.

i have a paragraph and taxonomy field which is referenced to content type. i am able to index these fields(all content filed, paragraph and taxonomy field using add fields in search api config)

my question is how can i show search result to the user if they search with some paragraph filed or taxonomy field and redirect the user to original content(node detail page) from the search result view page.

Hi,

I would like to create a new module, and I would need entities with pretty much all the same implementations/functionnality than the core Node module (revisions, translation, bundles, custom fields, forms, etc.).

What is the best way to achieve this? I'm not an experienced developper, that would be my first module, and I know that my question is a bit general and maybe lack a bit of context, but I just need to be on the right track to plan accordingly before I begin coding.

I want to create this functionality for a news website where i want to give access to single news to user only onc he puchase it

I'm writing a module that allows users to configure special access restrictions on nodes to reflect academic publishing agreements (called 'embargoes'), which are stored in a custom config entity that points to a node and describes what types of access restrictions should be applied, and who is exempt (users, roles, IP ranges, etc).