I don't suppose you've got links to any of those "Nina Hartley's Guide To"s? I searched on a couple platforms but came up dry. Or well not "dry", but fruitless...
As much as porn gets a bad rep for what not to do, I honestly think it's been the biggest help over the many years. Sure, it's not all feasible or enjoyable, but there are times you can absolutely see where it can work really well in the bedroom. I guess it all depends on what type of porn you're into as well. I think it has done me well figuring out what works best throughout the years, and will continue to help until I am either too old to care about sex or I drop dead.
Years ago I remember seeing a video, not sure if it was youtube, where a female sex therapist gives tips to a married couple. This was not porn but a real sex therapy session. I can no longer find anything like it.