Depends on the niche. For your niche of choice (energy, power generation and energy markets), I'd look for industry publications (both magazines and news sites), corporate press releases and news, academic papers on related topics, discussions on any energy industry specific forums or discussion sites, etc. Honestly, that's how I'd keep up with more traditional industries.

But that's an industry I imagine has an older audience and probably relies on more traditional sources of information. For something like a video game series (or game development project), musician/band, film series/TV show, book series, etc, my method of keeping up with the news would be more heavily centred around social media posts, subreddits, Discord servers, etc.