Study rivers, but also study flops from the side of the defender, as overfolding flops vs cbets compared with solver frequencies is one of the biggest redline leaks I have and I assume most of us have (coupled with not defending the BB enough vs preflop steals, which goes side by side with the flop defense thing). Perfecting flop strategy as the aggressor is not exactly a low hanging fruit and can wait til you got rid of more important leaks imho.
Just my 2c as I guess we are in the same journey right now
GL