How to separate custom post types stuff from template.

I am in my early stage on learning wp development and tried somethign “simple”.

To manage some custom entities in my back-end and try to display them in front-end. So what i did was:

– Created custom post type , custom taxonomies
– Created custom fields for all the stuff i need to keep
– Created page template for showing an index of my stuff
– Created a single template that displays one entity.

But i would like NOT to be dependent from the current template i use. What are the ways to achieve this? Should i create a plugin with shortcodes that output what i need? or something else?