Guys, big thank you to you all for support.
Still, the problem exists.
Our club has done a couple local fishing championships in this summer. We do make new content on our website, We run actively our social media channels, but I need more young people to do that.
But still... the forum is not restarting
From time to time we get new users (no it's not a spammers) in our forum but they don't do anything.
I monitoring other fishing forums and see that there are also similar problems: these forums have more members than our but they also are inactive...
I came up with an idea in the next fishing season make videos on "how to". But this will be in the next year.