I highly advise you to soak in as much information from the internet and books as possible.
There’s much to read & watch.
Then spend time on the water. Lots of time on the water trying what you’ve learned.
Sure this is basic advice but the best I can give you. If you haven’t started there then you haven’t started. Fishing with someone who has had success sure helps too.
Can you elaborate on your fishing tactics that haven’t been lucky?
Confluence is good, but there are fish in many places. It is also the busiest place right now as far as boat traffic.
Spawn finishing up can make Flatheads challenging. I’d be fishing a post spawn pattern right now.
IMO with Flatheads you either fish pre-spawn pattern or post spawn pattern. Fish don’t all spawn at the same time so there will always be more aggressive fish when working those patterns vs sitting on a spawn fishing pattern.
Go research man! Lots to learn.