One of the things I love the most about Warhammer Underworlds is the community. There are a plethora of posts, blogs, podcasts, and social media groups dedicated to informing the community on the many aspects of the game. You can really feel the passion when reading and listening to the content. In fact, many of these resources inspired me to start my own blog!
Here are a couple links to some fantastic resources:
Can You Roll A Crit? - Written by the prolific John Rees, a two-time grand clash winner, this is a great resource for competitive deck-building, tactics, and the overall meta, especially in the UK scene.
Katophrane Relic - Another fantastic blog written by Grand Clash winner, Jamie Giblin. This resource is full of tips, deck lists, battle reports, and UK meta awareness. Grand Clash winner Bryce Johnston also writes some guest articles too.
Claim The City - A US based podcast covering a plethora of topics such as tier lists, battle reports, warband reviews, and the meta. Great for newer and veteran players alike.
Agents of Sigmar - One of the more consistent battle report video channels out there, they showcase some entertaining match-ups with some interesting deck building limitations as well.
The Battle Cast - A Canadian based channel that features some great battle reports as well as competitive musings and product reviews.
Warhammer Underworlds Facebook Group - The largest Underworlds group on the social media platform. Members from all over the world post photos, questions, tournament recaps, and news. An excellent source of knowledge and fun!