Ah that's really cool to hear!
Art Society is honestly really fun, they're a pretty chill society. They hold different themed quite regularly, of doing different art activities. I think its quite nice, since you can quite easily choose to talk to others, or choose to focus on your own work. I recommend coming to a Give It A Go event - everyone would be new to society so its a nice way to try societies out.
Islamic Society is lovely too! I partake in that occasionally, and everyone is so lovely. They're really active and are always holding events. They're very active during Freshers Week, and hold events like meet and greet, halal social events to help you get settled into uni and make friends!
If you'd like/haven't already, I can send you more information about the societies, if you want to know what to expect from them?

~ Fatiha, Cardiff University Student Rep