Looking for Modern Pokemon Knowledge (Video Games)

I played pokemon super casually back in the day on the gameboy advanced. now I am getting back in to things and I feel like a lot of things have changed or been modernised to make it all run better / smoother.

What are some general insightful information, apps, resources. someone with a basic level of video game pokemon knowledge. Im talking Mobile apps I should download to get more knowledge, Content creators that have a good video, explaining all of this. Game recommendations, I recently got Legends: Arceus and still playing it but looking forward to the next steps. Literally anything you could want to know, as longs as its relevant to the Video Games side of things and not the TCG.