How to make every category a grid format?

Hello everyone,

I’m new to WordPress. The website I want to make is very simple. I am happy to confide to all the defaults of the ‘Simply Read’ wordpress theme apart from one change (at the moment…) which I just can’t seem to figure out how to do.

I have lots of categories and sub-categories and when clicked, the posts in those categories appear in a long list. Basically, all I want, is for the posts to appear in a grid format. 3 or 4 columns; each with thumbnail, title, a small amount of text, ‘read more’ link, perhaps a small social media icon or 2 – I think you get the gist of what I’m after.

I downloaded the plugin ‘post grid’ which seems all lovely and customisable but I can’t for the life of me work out how to it apply to my categories.

I’ve tried reading other forums surrounding this topic but being completely new to this, talks of PHP and coding goes completely over my head.

I am more than happy to learn about this of course, but at the moment I don’t even have a clue where to start. If anyone were able to help me in a ‘guide for dummies’ style that would be greatly appreciated.

Thank you in advance!!