I find presets I like and then break them down and examine all the parts of them and the effects they have. That was the same thing I did with actions in Photoshop.
When I first got LR several years ago I scoured the internet for tutorials, unfortunately, I didn't save any of them (I know, not very helpful). I founds loads of free preset that I use (or have modified). There are still things I prefer PS for too.
I really wish there was the ability to open a layered file in PS.. it would be nice for project life.. I have all my photos on the templates and would love to go into lightroom after it is finished to edit the photos