New player looking for deck advice

Just started playing last month and have been enjoying slowly climbing the arenas in trophy mode so far (up to Arena 12)

I've just gotten the Inferno Dragon legendary card. I've been trying to look up builds that feature it along with Electro Dragon (got evo for) and Ice Golem, two other cards I've been enjoying using so far but having zero luck.

I was wondering if there's a deck, regardless of how 'meta' it is, that I could aim to build in the long term that involves all three and, at the very least, makes some sense? I was considering a Golem deck using them, but I'll be honest, I don't know if they work together much at all.

I also got up to 200 hero fragments and unlocked the Hero Ice Golem(It was my highest card thanks to chests), and I was wondering if I've messed up, as my friend claims I've wasted them on it.