Change lightbox in modal

Hi, I need help creating a lightbox. According to Anna Sabatini tutotrial, I made a custom lightbox in the gallery, see my link in the link, but now I need to zoom in the picture I could switch between the other pictures in the gallery.
Can anyone help me?
Thanks
M.

Here is my site Read-Only: https://preview.webflow.com/preview/pixbakers?utm_medium=preview_link&utm_source=dashboard&utm_content=pixbakers&preview=09fb0341aa161da5e2bf643cc038779f&mode=preview

(how to share your site Read-Only link)