How to set up a model and call it in a view to load an image?

Question

Ruby on Rails

Good evening.
There is a laid-out front in html (css, js), I'm learning RoR, so I wanted to add back with minimal changes to the front.
I stuffed the html into erb, created a controller, the site went up, devise, pg - everything is displayed and works as it should. But I faced the problem of loading images (Jpg, png) by clicking on the image. All casts consider creating a blog, generating html from scratch, adding images through the f.input :image form. How can I add this function to html.erb without using a form. Uploader and carrierwave are already configured.
Thanks in advance.