Lemmy is great and it is in essence an aggregated forum. But I would like to know how I can also find forums about specific topics.

For example I am very interested in football but the only place I can really find any discussion of football is r/soccer on reddit. I would like to find smaller but active forums where the discussions are more slow paced and drawn out over time.

I would like to know how to find these places on the internet, if they still exist, for any topic.