Adding instagram gallery to the footer

Hi there. I am wanting to add an instagram gallery into the footer of my blog. I am using a www.remarpro.com site.

I have tried many things and can’t seem to figure it out. Under my theme options, I go to an area called Footer Script(s), I have placed text here to try to get my instagram feed to show up. All that shows up is the text – which is in the place I want it to be, but no gallery.

I used instagram feed which looks like this: [instagram-feed] and even tried using the do_shortcode but nothing works.

For reference, I would like it to look how this blogger has it:
https://garypeppergirl.com/

Thank you!