Add Gallery in photo page

Hello, I'm using your theme for my future blog and I love it, thanks a lot for your great job. However, I had a question about the photos. In some cases I have several photos of the same theme, especially when I visit an exhibition or event. I'd like to be able to create a gallery below the text on the presentation photo. I've tried to install hugo-easy-gallery by following the [documentation](https://github.com/Darthagnon/hugo-easy-gallery/tree/production?tab=readme-ov-file#installation), but nothing works properly. I can display the gallery but it's badly displayed. I think it's the CSS code, but I don't know anything about CSS. Could you help me to adjust the last parameters please? Best regards, Colmaris