BWS-PLUGIN recommend best gallery plugin for my site

Hi,
current plugin is not working for me, i am looking for a new plugin,

objectives are:
small image can be added as thumbnail/feature image which will appear on page as category.
more images can be added under each category.
when we click on thumbnail image, only added image must appear.
check this website
https://newmirage.net/types-of-pools/
when u click on any type of pool, you will see the thumbnail image first, i want to disable this.
thx