What are some good resources for improving my skills with rifles? (

I am a handgun guy but am looking to better my skills with long guns. I have access to some excellent instructors locally but I am the kind of person who devours information and obsesses over training so I will be doing tons of self study and want to make sure I am getting good guidance.

What are some good resources that are available?

FYI I go to the range at least once a week and do dry fire practice daily, so I will definitely be putting in the hours necessary to train, but want to make sure I'm training effectively.

My process with handguns was to rely on developing my skills with iron sights and unmodified guns until I had become competent before I allowed myself to begin adding red dots and other improvements to make sure I wasn't just relying on crutches, and I plan to take the same approach with long guns.

I've had several long guns for quite some time but for various reasons I've never really trained with them until I decided that I needed to recently and was shocked by how much I sucked and how my handgun skills did not carry over nearly as much as I expected.

Any and all advice is appreciated. Thanks!