How do I place connect a template to a certain content type As the questions says, how do I perform this and how do I render certain fields at certain spots placed in the template file?

I already got it so that everything is placed by using 


  {{ page.content }}


But how do I do something like:


  {{ field_textblock }}


In where the given input in that field would be display on the site.
I think you could use the "without" filter on the {{ page.content }} as below:

{{ page.content|without(field_textblock) }}


and then you should be able to output "field_textblock" as you were before.

There is a good page about twig filters here https://www.drupal.org/node/2357633