used to subscribe to a UK magazine PC PILOT that came out monthly.
Amongst talking about sims, add-ons etc, it had a section that went into various aspects of IFR lying in detail. One week might be reading approach charts, the next explain beacons etc etc. Modern version would be finding a decent youtube channels
Honestly… I can’t understate the influence from Air Crash Investigations. The level of detail they go into flight procedures and systems is incredible. Frankly I know more about flight systems based on stories of failures relating to those systems and why they are important. After watching enough episodes you can begin to spot the errors and reasons for crashes before they are spelled out by the doco.
then cleaning it all up, refining the procedures via checklists and listening to actual pilots and yt cockpit vids, especially landing procedures