First of all, keep in mind that trying to learn how to have sex from porn is like trying to learn how to have relationships from romance films. Probably not the best idea.
As for free resources you can learn quality stuff from, it can be difficult to wade through all of the terrible advice out there but look into
tantra. No need to get deep into that stuff. Just taking bits and pieces from it helps a lot.
If you want to get straight to the not-free, premium quality stuff that will take you from point A to point B in the shortest amount of time possible, check out
Female Mind Mastery. They've got instructional videos like the old 2 Girls Teach Sex program, except better.
However, there is no better teacher than experience. Have more sex and you'll get better at it as long as you're not a dumbass who keeps doing the same shit over and over. Experiment and calibrate.