Hey Omakase, if you've had trouble finding tickets check out Songkick. We've built the largest database (over 20 ticket vendors now) of ticketed concerts in the world so hopefully can help.
Unfortunately, most of the time the shows I'm interested in only show up on very niche forums -- but services like Songkick are definitely making things easier than they were four years ago.
we have though got pretty much every ticketed concert in the UK and US listed so would love to see examples of stuff we're missing when you come across them (ian at our domain).